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List of Roman-to-modern scheduled monuments in Gwynedd facts for kids

Kids Encyclopedia Facts

Gwynedd is a large rural county in North Wales. The northern half includes the high mountains of Snowdonia and the mixed farmland and hills of the Lleyn peninsula, which between them make up the former county of Caernarvonshire. The southern part of Gwynedd is the softer coastal and upland landscapes of the former county of Merionethshire. Gwynedd, the second largest county in Wales, has a total of 497 Scheduled monuments. That is too many to have on a single list article, so for convenience the list is divided into three. The 365 prehistoric sites are in two lists, covering 171 sites in former Merionethshire, and 194 sites in former Caernarvonshire. Below are the 132 sites dating from Roman to modern times, from the whole of Gwynedd. Gwynedd is a unitary authority comprising most of two historic counties. In 1974 it also merged with Anglesey, and the merged county was also called Gwynedd. Since 1996 Anglesey has been a separate county again.

There are 16 Roman scheduled sites on the list, almost all of which relate either to Roman military activity, or local defensive measures. By contrast, the 14 early medieval (Dark Age) monuments are all individual stones, either with carved crosses or other inscriptions or in one case a sundial. The 53 post-Norman medieval sites include sites included in the Castles and Town Walls of King Edward in Gwynedd World Heritage Site. Seven castles, 11 mottes, and seven enclosures are scheduled, as well as deserted settlements, two abbeys, five chapels and two holy wells. The 49 post-medieval sites include ten bridges, various sites relating to quarries, mines, engine houses, and railways, and five World War II defences.

The northern prehistoric sites are listed at List of prehistoric scheduled monuments in Gwynedd (former Caernarvonshire)

The southern prehistoric sites are listed at List of prehistoric scheduled monuments in Gwynedd (former Merionethshire)

Scheduled monuments have statutory protection. It is illegal to disturb the ground surface or any standing remains. The compilation of the list is undertaken by Cadw Welsh Historic Monuments, which is an executive agency of the National Assembly of Wales. The list of scheduled monuments below is supplied by Cadw with additional material from RCAHMW and Gwynedd Archaeological Trust.

Main pages: Lists of scheduled monuments in Wales and Scheduled monuments in Gwynedd

Roman to modern scheduled monuments in Gwynedd

Image Name Site type Community Location Details Historic County Period SAM No
& Refs
Enclosure & Settlement 400m East of Cyfannedd Fawr Hut circle settlement Arthog 52°41′25″N 4°01′20″W / 52.6904°N 4.0223°W / 52.6904; -4.0223 (Enclosure & Settlement 400m East of Cyfannedd Fawr),
SH634122		 Merionethshire 2Roman
 ME086
Round Hut and Cairns on NW Slope of Braich Ddu Ring cairn Arthog 52°41′23″N 4°01′15″W / 52.6896°N 4.0208°W / 52.6896; -4.0208 (Round Hut and Cairns on NW Slope of Braich Ddu),
SH635121		 Merionethshire 2Roman
 ME100
View of Bangor and Penrhyn from the Roman Camp Pier Camp Earthwork Bangor 53°14′02″N 4°07′39″W / 53.2339°N 4.1276°W / 53.2339; -4.1276 (Pier Camp),
SH581729		 Strongly defensible earthworth hillfort. A 4th century Roman coin found on the site. Caernarvonshire 2Unknown
 CN073
Dinas Emrys Dinas Emrys Camp Hillfort Beddgelert 53°01′20″N 4°04′44″W / 53.0222°N 4.0788°W / 53.0222; -4.0788 (Dinas Emrys Camp),
SH606492		 Hilltop fort which tradition links with Vortigern and Merlin. Iron Age, Roman and Dark Age evidence has all been found. Present stonework probably, medieval. Caernarvonshire 2Roman
 CN018
Brithdir Roman Fort Roman fort Brithdir and Llanfachreth 52°45′13″N 3°49′15″W / 52.7535°N 3.8209°W / 52.7535; -3.8209 (Brithdir Roman Fort),
SH772188		 Roman fortlet which may also have had its own settlement. Now on the edge of the village if Brithdir. Merionethshire 2Roman
 ME080
Looking NW across the site of the Segontium Roman Fort Segontium Roman Fort Property in the care of Cadw Roman fort Caernarfon 53°08′14″N 4°15′58″W / 53.1372°N 4.2662°W / 53.1372; -4.2662 (Segontium Roman Site),
SH485624		 Regiment garrisoned here from 77AD to 394AD, a uniquely long occupation within Wales. It was the administrative centre for NW Wales throughout this period. Excavated buildings on view. Caernarvonshire 2Roman
 CN006
Lower Roman Fort Roman fort Caernarfon 53°08′12″N 4°16′13″W / 53.1367°N 4.2702°W / 53.1367; -4.2702 (Lower Roman Fort),
SH482623		 Caernarvonshire 2Roman
 CN094
Bryn-Glas Roman Signal Station Signal station Caernarfon 53°08′50″N 4°14′24″W / 53.1473°N 4.2401°W / 53.1473; -4.2401 (Bryn-Glas Roman Signal Station),
SH502634		 Caernarvonshire 2Roman
 CN188
Llanfor Roman Fort and Camps Roman fort Llandderfel 52°54′45″N 3°34′55″W / 52.9124°N 3.582°W / 52.9124; -3.582 (Llanfor Roman Fort and Camps (revealed by Aerial Photography)),
SH937361		 (revealed by Aerial Photography) Merionethshire 2Roman
 ME092
Caer Gai Roman Site Roman fort Llanuwchllyn 52°52′08″N 3°40′07″W / 52.8688°N 3.6686°W / 52.8688; -3.6686 (Caer Gai Roman Site),
SH877314		 Merionethshire 2Roman
 ME018
Dinas y Prif Camp Enclosure Llanwnda 53°05′42″N 4°17′46″W / 53.0949°N 4.2961°W / 53.0949; -4.2961 (Dinas y Prif Camp),
SH463577		 Caernarvonshire 2Roman
 CN030
Castell Tomen y Mur Castell Tomen y Mur Amphitheatre Maentwrog 52°55′48″N 3°55′30″W / 52.9299°N 3.925°W / 52.9299; -3.925 (Castell Tomen y Mur),
SH705386		 Merionethshire 2Roman
 ME002
Tomen y Mur Roman fort Maentwrog 52°55′39″N 3°55′17″W / 52.9276°N 3.9214°W / 52.9276; -3.9214 (Tomen y Mur),
SH709384		 Merionethshire 2Roman
 ME078
Cefn-Caer Roman Site Roman fort Pennal 52°35′00″N 3°54′45″W / 52.5832°N 3.9125°W / 52.5832; -3.9125 (Cefn-Caer Roman Site),
SH705000		 Merionethshire 2Roman
 ME009
Roman Bath-House, Tremadoc Bath-house Porthmadog 52°56′21″N 4°08′54″W / 52.9392°N 4.1482°W / 52.9392; -4.1482 (Roman Bath-House, Tremadoc),
SH557401		 Caernarvonshire 2Roman
 CN174
Roman Kilns 225m SE of Pen-y-Stryd Kiln Trawsfynydd 52°52′11″N 3°53′30″W / 52.8697°N 3.8918°W / 52.8697; -3.8918 (Roman Kilns 225m SE of Pen-y-Stryd),
SH727319		 Merionethshire 2Roman
 ME071
Dol-ddinas Roman Earthworks Practice camp Trawsfynydd 52°55′27″N 3°53′01″W / 52.9241°N 3.8836°W / 52.9241; -3.8836 (Dol-ddinas Roman Earthworks),
SH734379		 Merionethshire 2Roman
 ME077
Roman Practice Camp 440m WSW of Braich-ddu Practice camp Trawsfynydd 52°55′39″N 3°54′39″W / 52.9274°N 3.9109°W / 52.9274; -3.9109 (Roman Practice Camp 440m WSW of Braich-ddu),
SH716383		 Merionethshire 2Roman
 ME260
Roman Practice Camps 190m W of Llyn Hiraethlyn Practice camp Trawsfynydd 52°54′51″N 3°52′24″W / 52.9141°N 3.8733°W / 52.9141; -3.8733 (Roman Practice Camps 190m W of Llyn Hiraethlyn),
SH741368		 Merionethshire 2Roman
 ME261
Roman Road Extending SE 650m from Llyn Hiraethlyn toward Glasgoed Roman Road Trawsfynydd 52°54′49″N 3°52′06″W / 52.9135°N 3.8683°W / 52.9135; -3.8683 (Roman Road Extending SE 650m from Llyn Hiraethlyn toward Glasgoed),
SH743368		 Merionethshire 2Roman
 ME262
The Senacus Stone (formerly in Tudweiliog, Dwyfer) Inscribed stone Aberdaron 52°48′14″N 4°42′41″W / 52.8039°N 4.7113°W / 52.8039; -4.7113 (The Senacus Stone (formerly in Tudweiliog, Dwyfer)),
SH173263		 Caernarvonshire 3Early Medieval
 CN089
The Veracius Stone (formerly in Tudweiliog, Dwyfer) Inscribed stone Aberdaron 52°48′14″N 4°42′41″W / 52.8039°N 4.7113°W / 52.8039; -4.7113 (The Veracius Stone (formerly in Tudweiliog, Dwyfer)),
SH173263		 Caernarvonshire 3Early Medieval
 CN090
Cross-Inscribed Stone in the Chapel, Bardsey Island Cross-marked stone Aberdaron 52°45′51″N 4°47′12″W / 52.7641°N 4.7868°W / 52.7641; -4.7868 (Cross-Inscribed Stone in the Chapel, Bardsey Island),
SH120221		 Caernarvonshire 3Early Medieval
 CN141
Inscribed Stone in the Chapel, Bardsey Island Inscribed stone Aberdaron 52°45′51″N 4°47′12″W / 52.7641°N 4.7868°W / 52.7641; -4.7868 (Inscribed Stone in the Chapel, Bardsey Island),
SH120221		 Caernarvonshire 3Early Medieval
 CN142
Sundial in Clynnog Fawr Churchyard Sundial Clynnog 53°01′15″N 4°21′56″W / 53.0208°N 4.3656°W / 53.0208; -4.3656 (Sundial in Clynnog Fawr Churchyard),
SH414496		 Caernarvonshire 3Early Medieval
 CN062
Cross Inscribed Stone Near Capel Uchaf Cross-marked stone Clynnog 53°01′23″N 4°20′30″W / 53.023°N 4.3417°W / 53.023; -4.3417 (Cross Inscribed Stone Near Capel Uchaf),
SH430498		 Caernarvonshire 3Early Medieval
 CN213
Gesail Gyfarch Inscribed Stone Inscribed stone Dolbenmaen 52°57′10″N 4°10′29″W / 52.9528°N 4.1746°W / 52.9528; -4.1746 (Gesail Gyfarch Inscribed Stone),
SH540417		 Caernarvonshire 3Early Medieval
 CN019
Llystyn Gwyn Inscribed Stone Inscribed stone Dolbenmaen 52°59′08″N 4°15′45″W / 52.9855°N 4.2626°W / 52.9855; -4.2626 (Llystyn Gwyn Inscribed Stone),
SH482455		 Caernarvonshire 3Early Medieval
 CN021
Early Christian Inscribed Stone in the Churchyard, Llanaelhaearn Inscribed stone Llanaelhaearn 52°58′35″N 4°24′15″W / 52.9764°N 4.4041°W / 52.9764; -4.4041 (Early Christian Inscribed Stone in the Churchyard, Llanaelhaearn),
SH386448		 Caernarvonshire 3Early Medieval
 CN084
Part of Inscribed Stone Built into Wall of Churchyard Inscribed stone Llanaelhaearn 52°58′35″N 4°24′15″W / 52.9763°N 4.4041°W / 52.9763; -4.4041 (Part of Inscribed Stone Built into Wall of Churchyard),
SH386448		 Caernarvonshire 3Early Medieval
 CN085
Inscribed Stone in St Cian's Churchyard, Llangian Inscribed stone Llanengan 52°49′51″N 4°31′53″W / 52.8309°N 4.5314°W / 52.8309; -4.5314 (Inscribed Stone in St Cian's Churchyard, Llangian),
SH295289		 Caernarvonshire 3Early Medieval
 CN087
Cross-Incised Stone in Llangybi Churchyard Cross-marked stone Llanystumdwy 52°56′41″N 4°20′25″W / 52.9447°N 4.3402°W / 52.9447; -4.3402 (Cross-Incised Stone in Llangybi Churchyard),
SH428411		 Caernarvonshire 3Early Medieval
 CN100
Cross Slab Built into Farm Building Ty'n-y-Cae Cross-marked stone Nefyn 52°56′25″N 4°30′46″W / 52.9404°N 4.5127°W / 52.9404; -4.5127 (Cross Slab Built into Farm Building Ty'n-y-Cae),
SH312410		 Caernarvonshire 3Early Medieval
 CN180
Tymawr Cross-Incised Stone Cross-marked stone Pistyll 52°56′50″N 4°30′08″W / 52.9473°N 4.5023°W / 52.9473; -4.5023 (Tymawr Cross-Incised Stone),
SH319418		 Caernarvonshire 3Early Medieval
 CN101
Aber Castle Mound (Pen-y-Mwd) Motte Aber 53°14′02″N 4°00′50″W / 53.2338°N 4.014°W / 53.2338; -4.014 (Aber Castle Mound (Pen-y-Mwd)),
SH656726		 Caernarvonshire 4Medieval
 CN007
Medieval Homestead 400m SE of Maes y Gaer Rectangular hut settlement Aber 53°13′51″N 3°59′56″W / 53.2307°N 3.9988°W / 53.2307; -3.9988 (Medieval Homestead 400m SE of Maes y Gaer),
SH666722		 Caernarvonshire 4Medieval
 CN137
Enclosure & Associated Structures at Pen-y-Bryn Enclosure Aber 53°14′06″N 4°00′43″W / 53.235°N 4.012°W / 53.235; -4.012 (Enclosure & Associated Structures at Pen-y-Bryn),
SH658727		 Caernarvonshire 4Medieval
 CN218
Bardsey Island - St Mary's Abbey St Mary's Abbey, Bardsey Island Abbey Aberdaron 52°45′51″N 4°47′16″W / 52.7643°N 4.7877°W / 52.7643; -4.7877 (St Mary's Abbey, Bardsey Island),
SH120221		 Caernarvonshire 4Medieval
 CN068
Site of St Merin's Church Church Aberdaron 52°50′59″N 4°42′51″W / 52.8498°N 4.7143°W / 52.8498; -4.7143 (Site of St Merin's Church),
SH173314		 Caernarvonshire 4Medieval
 CN171
Long Houses, Enclosures & Field Systems, Bardsey Island Rectangular hut Aberdaron 52°46′03″N 4°47′27″W / 52.7674°N 4.7908°W / 52.7674; -4.7908 (Long Houses, Enclosures & Field Systems, Bardsey Island),
SH118225		 Caernarvonshire 4Medieval
 CN186
Capel Anelog Chapel Aberdaron 52°48′47″N 4°44′16″W / 52.813°N 4.7377°W / 52.813; -4.7377 (Capel Anelog),
SH155274		 Caernarvonshire 4Medieval
 CN220
Long House South of Talarfor Longhouse Aberdaron 52°49′27″N 4°37′30″W / 52.8241°N 4.6251°W / 52.8241; -4.6251 (Long House South of Talarfor),
SH232284		 Caernarvonshire 4Medieval
 CN318
St Mary's Church Church Aberdaron 52°47′36″N 4°45′40″W / 52.7934°N 4.7612°W / 52.7934; -4.7612 (St Mary's Church),
SH139253		 Caernarvonshire 4Medieval
 CN381
Llys Bradwen Medieval Site Enclosure Arthog 52°42′20″N 3°59′57″W / 52.7055°N 3.9993°W / 52.7055; -3.9993 (Llys Bradwen Medieval Site),
SH650138		 Merionethshire 4Medieval
 ME022
Cyfannedd-Fach Homestead Platform house Arthog 52°41′44″N 4°01′33″W / 52.6955°N 4.0257°W / 52.6955; -4.0257 (Cyfannedd-Fach Homestead),
SH631127		 Merionethshire 4Medieval
 ME101
Tomen y Bala Castle Mound Motte Bala 52°54′41″N 3°35′44″W / 52.9115°N 3.5955°W / 52.9115; -3.5955 (Tomen y Bala Castle Mound),
SH928360		 Merionethshire 4Medieval
 ME016
Ty'n Twr Building (Unclassified) Bethesda 53°10′24″N 4°03′26″W / 53.1734°N 4.0571°W / 53.1734; -4.0571 (Ty'n Twr),
SH626660		 Caernarvonshire 4Medieval
 CN219
Hafod-y-Wern Long Hut Rectangular hut Betws Garmon 53°05′32″N 4°12′06″W / 53.0922°N 4.2016°W / 53.0922; -4.2016 (Hafod-y-Wern Long Hut),
SH526572		 Caernarvonshire 4Medieval
 CN307
Ystrad Rural Settlement Deserted Rural Settlement Betws Garmon 53°05′37″N 4°10′29″W / 53.0935°N 4.1746°W / 53.0935; -4.1746 (Ystrad Rural Settlement),
SH544573		 Caernarvonshire 4Medieval
 CN316
Cored Gwyrfai Fish Weir Fish weir Bontnewydd 53°07′22″N 4°18′54″W / 53.1228°N 4.3151°W / 53.1228; -4.3151 (Cored Gwyrfai Fish Weir),
SH453607		 Caernarvonshire 4Medieval
 CN334
Castell Cynfal, Bryn Crug Motte Bryn-crug 52°35′41″N 4°02′46″W / 52.5946°N 4.0462°W / 52.5946; -4.0462 (Castell Cynfal, Bryn Crug),
SH615016		 Merionethshire 4Medieval
 ME121
Caernarfon Town Wall Caernarfon Town Walls Property in the care of Cadw Town Wall Caernarfon 53°08′28″N 4°16′31″W / 53.141°N 4.2754°W / 53.141; -4.2754 (Caernarfon Town Wall),
SH479626		 Caernarvonshire 4Medieval
 CN034
Caernarfon Castle Caernarfon Castle Property in the care of Cadw World Heritage Site Castle Caernarfon 53°08′22″N 4°16′37″W / 53.1394°N 4.277°W / 53.1394; -4.277 (Caernarfon Castle),
SH477626		 Caernarvonshire 4Medieval
 CN079
St Beuno's Well, Clynnog Fawr St Beuno's Well Holy Well Clynnog 53°01′08″N 4°22′01″W / 53.0188°N 4.367°W / 53.0188; -4.367 (St Beuno's Well),
SH413494		 Caernarvonshire 4Medieval
 CN091
Long Hut North of Cwm Farm Rectangular hut Clynnog 52°59′19″N 4°19′58″W / 52.9887°N 4.3327°W / 52.9887; -4.3327 (Long Hut North of Cwm Farm),
SH435460		 Caernarvonshire 4Medieval
 CN309
Criccieth Castle Criccieth Castle Property in the care of Cadw Castle Criccieth 52°54′58″N 4°13′57″W / 52.916°N 4.2324°W / 52.916; -4.2324 (Criccieth Castle),
SH499377		 Caernarvonshire 4Medieval
 CN015
Criccieth Castle, Outer Bank Defences Castle Criccieth 52°54′57″N 4°14′02″W / 52.9157°N 4.2338°W / 52.9157; -4.2338 (Criccieth Castle, Outer Bank Defences),
SH499377		 Caernarvonshire 4Medieval
 CN173
Dolbenmaen Castle Mound Motte Dolbenmaen 52°57′51″N 4°13′30″W / 52.9642°N 4.2251°W / 52.9642; -4.2251 (Dolbenmaen Castle Mound),
SH506430		 Caernarvonshire 4Medieval
 CN063
Maes Coch Deserted Rural Settlement Rectangular hut settlement Dolgellau 52°43′16″N 3°51′42″W / 52.721°N 3.8617°W / 52.721; -3.8617 (Maes Coch Deserted Rural Settlement),
SH743153		 Merionethshire 4Medieval
 ME196
Settlement & Fields Systems above Egryn Abbey House platform Dyffryn Ardudwy 52°45′42″N 4°04′10″W / 52.7617°N 4.0695°W / 52.7617; -4.0695 (Settlement & Fields Systems above Egryn Abbey),
SH604202		 Merionethshire 4Medieval
 ME122
Eithin-Fynydd Platform House Settlement Deserted Rural Settlement Dyffryn Ardudwy 52°46′30″N 4°04′38″W / 52.7749°N 4.0771°W / 52.7749; -4.0771 (Eithin-Fynydd Platform House Settlement),
SH599217		 Merionethshire 4Medieval
 ME202
Deserted Rural Settlement South of Ffridd Olchfa Deserted Rural Settlement Dyffryn Ardudwy 52°44′47″N 4°03′35″W / 52.7465°N 4.0598°W / 52.7465; -4.0598 (Deserted Rural Settlement South of Ffridd Olchfa),
SH610185		 Merionethshire 4Medieval
 ME203
Harlech Castle at sundown Harlech Castle Property in the care of Cadw World Heritage Site Castle Harlech 52°51′37″N 4°06′33″W / 52.8602°N 4.1091°W / 52.8602; -4.1091 (Harlech Castle),
SH581312		 Merionethshire 4Medieval
 ME044
Medieval Ecclesiastical Structure SE of Ty'n y Coed Cottage Chapel Llanbedr 52°49′35″N 4°05′18″W / 52.8265°N 4.0882°W / 52.8265; -4.0882 (Medieval Ecclesiastical Structure SE of Ty'n y Coed Cottage),
SH594274		 Merionethshire 4Medieval
 ME249
Dolbadarn Castle, Llanberis Pass Dolbadarn Castle Property in the care of Cadw Castle Llanberis 53°07′00″N 4°06′51″W / 53.1166°N 4.1143°W / 53.1166; -4.1143 (Dolbadarn Castle),
SH586598		 Caernarvonshire 4Medieval
 CN066
Cwm Brwynog Deserted Rural Settlement Deserted Rural Settlement Llanberis 53°05′24″N 4°06′06″W / 53.0901°N 4.1017°W / 53.0901; -4.1017 (Cwm Brwynog Deserted Rural Settlement),
SH594574		 Caernarvonshire 4Medieval
 CN315
Rectangular Earthwork 110m NW of Coed Ty Mawr Moated Site Llanddeiniolen 53°10′31″N 4°09′46″W / 53.1753°N 4.1629°W / 53.1753; -4.1629 (Rectangular Earthwork 110m NW of Coed Ty Mawr),
SH555664		 Caernarvonshire 4Medieval
 CN156
Castell Llanddeiniolen Motte Llanddeiniolen 53°10′04″N 4°08′29″W / 53.1677°N 4.1414°W / 53.1677; -4.1414 (Castell Llanddeiniolen),
SH569655		 Caernarvonshire 4Medieval
 CN197
Llys Dinorwig Enclosure Llanddeiniolen 53°08′47″N 4°09′03″W / 53.1463°N 4.1508°W / 53.1463; -4.1508 (Llys Dinorwig),
SH562631		 Caernarvonshire 4Medieval
 CN223
Pen-Ucha'r-Llan Ringwork Ringwork Llandderfel 52°55′07″N 3°34′50″W / 52.9186°N 3.5805°W / 52.9186; -3.5805 (Pen-Ucha'r-Llan Ringwork),
SH938368		 Merionethshire 4Medieval
 ME042
Domen Ddreiniog Motte Llanegryn 52°36′44″N 4°04′25″W / 52.6121°N 4.0737°W / 52.6121; -4.0737 (Domen Ddreiniog),
SH596036		 Merionethshire 4Medieval
 ME054
Cymer Abbey Cymer Abbey Property in the care of Cadw Abbey Llanelltyd 52°45′29″N 3°53′46″W / 52.7581°N 3.8962°W / 52.7581; -3.8962 (Cymer Abbey),
SH721195		 Merionethshire 4Medieval
 ME001
Cymmer Castle Motte Llanelltyd 52°45′31″N 3°52′51″W / 52.7585°N 3.8808°W / 52.7585; -3.8808 (Cymmer Castle),
SH731195		 Merionethshire 4Medieval
 ME150
Castell y Bere courtyard Castell y Bere Property in the care of Cadw Castle Llanfihangel-y-Pennant 52°39′30″N 3°58′16″W / 52.6583°N 3.9711°W / 52.6583; -3.9711 (Castell y Bere),
SH667085		 Merionethshire 4Medieval
 ME023
Pont Maesgwm Deserted Rural Settlement Deserted Rural Settlement Llanfrothen 52°58′34″N 4°01′57″W / 52.976°N 4.0324°W / 52.976; -4.0324 (Pont Maesgwm Deserted Rural Settlement),
SH635440		 Merionethshire 4Medieval
 ME193
Castell Gronw Castle Mound Motte Llangywer 52°54′07″N 3°35′32″W / 52.902°N 3.5921°W / 52.902; -3.5921 (Castell Gronw Castle Mound),
SH930350		 Merionethshire 4Medieval
 ME067
Huts 90m N of Cil Twllan Platform house Llanllechid 53°10′40″N 4°02′25″W / 53.1779°N 4.0403°W / 53.1779; -4.0403 (Huts 90m N of Cil Twllan),
SH637664		 Caernarvonshire 4Medieval
 CN144
Cwm Caseg Deserted Rural Settlement Deserted Rural Settlement Llanllechid 53°10′39″N 4°01′31″W / 53.1774°N 4.0254°W / 53.1774; -4.0254 (Cwm Caseg Deserted Rural Settlement),
SH647664		 Caernarvonshire 4Medieval
 CN314
Ty-Newydd Mound & Bailey Castle Motte & Bailey Llannor 52°55′00″N 4°27′37″W / 52.9166°N 4.4604°W / 52.9166; -4.4604 (Ty-Newydd Mound & Bailey Castle),
SH346383		 Caernarvonshire 4Medieval
 CN096
Castell Carn Dochan Castle Llanuwchllyn 52°51′40″N 3°42′50″W / 52.861°N 3.7139°W / 52.861; -3.7139 (Castell Carn Dochan),
SH847306		 Merionethshire 4Medieval
 ME049
Tomen Fawr Ringwork Llanystumdwy 52°54′50″N 4°18′01″W / 52.9139°N 4.3002°W / 52.9139; -4.3002 (Tomen Fawr),
SH454376		 Caernarvonshire 4Medieval
 CN031
Ffynnon Gybi Holy Well Llanystumdwy 52°56′44″N 4°20′32″W / 52.9456°N 4.3421°W / 52.9456; -4.3421 (Ffynnon Gybi),
SH427412		 Caernarvonshire 4Medieval
 CN037
Penarth Fawr, near Chwilog, Pwllheli Penarth Fawr Medieval House Property in the care of Cadw House (domestic) Llanystumdwy 52°54′48″N 4°21′09″W / 52.9132°N 4.3524°W / 52.9132; -4.3524 (Penarth Fawr Medieval Hall),
SH419376		 Caernarvonshire 4Medieval
 CN086
Tomen Las Castle Mound Motte Pennal 52°35′04″N 3°55′28″W / 52.5845°N 3.9245°W / 52.5845; -3.9245 (Tomen Las Castle Mound),
SH697002		 Merionethshire 4Medieval
 ME043
Inscribed Stone in Llanfihangel Traethau Churchyard Inscribed stone Talsarnau 52°53′51″N 4°05′25″W / 52.8975°N 4.0902°W / 52.8975; -4.0902 (Inscribed Stone in Llanfihangel Traethau Churchyard),
SH595353		 Merionethshire 4Medieval
 ME050
Llidiart-Garw Platform House and Paddock Platform house Talsarnau 52°52′42″N 4°03′51″W / 52.8784°N 4.0641°W / 52.8784; -4.0641 (Llidiart-Garw Platform House and Paddock),
SH611332		 Merionethshire 4Medieval
 ME112
Castell Prysor Castell Prysor Motte & Bailey Trawsfynydd 52°54′53″N 3°50′55″W / 52.9148°N 3.8487°W / 52.9148; -3.8487 (Castell Prysor),
SH757368		 Merionethshire 4Medieval
 ME045
Bont Newydd Bont-Newydd Bridge Aber 53°13′42″N 4°00′18″W / 53.2282°N 4.0049°W / 53.2282; -4.0049 (Bont-Newydd),
SH662720		 Caernarvonshire 5Post-Medieval/Modern
 CN061
Cwm Erch Copper Mine Copper mine Beddgelert 53°03′25″N 4°02′24″W / 53.057°N 4.04°W / 53.057; -4.04 (Cwm Erch Copper Mine),
SH633530		 Caernarvonshire 5Post-Medieval/Modern
 CN193
Glasdir Copper and Gold Mine Mill Mill Brithdir and Llanfachreth 52°47′09″N 3°52′17″W / 52.7857°N 3.8715°W / 52.7857; -3.8715 (Glasdir Copper and Gold Mine Mill),
SH738225		 Merionethshire 5Post-Medieval/Modern
 ME206
historic bridge known as "Pont Y Cim" Pont y Cim Bridge Clynnog 53°02′43″N 4°19′35″W / 53.0452°N 4.3263°W / 53.0452; -4.3263 (Pont y Cim),
SH441523		 Caernarvonshire 5Post-Medieval/Modern
 CN053
Water Balance Incline at Aberllefenni Slate Quarry Incline Corris 52°40′29″N 3°49′26″W / 52.6746°N 3.824°W / 52.6746; -3.824 (Water Balance Incline at Aberllefenni Slate Quarry),
SH767101		 Merionethshire 5Post-Medieval/Modern
 ME185
Gorseddau or Ynysypandy Slate Factory Slate mill Dolbenmaen 52°58′05″N 4°09′35″W / 52.9681°N 4.1598°W / 52.9681; -4.1598 (Gorseddau or Ynysypandy Slate Factory),
SH550433		 Caernarvonshire 5Post-Medieval/Modern
 CN160
Gilfach Copper Mine Copper mine Dolbenmaen 53°00′25″N 4°11′54″W / 53.0069°N 4.1984°W / 53.0069; -4.1984 (Gilfach Copper Mine),
SH526477		 Caernarvonshire 5Post-Medieval/Modern
 CN170
Gorseddau Slate Quarry Railway Dolbenmaen 52°59′09″N 4°07′40″W / 52.9858°N 4.1279°W / 52.9858; -4.1279 (Gorseddau Slate Quarry),
SH572452		 Caernarvonshire 5Post-Medieval/Modern
 CN303
Treforys Deserted Quarry Settlement Settlement Dolbenmaen 52°59′11″N 4°08′42″W / 52.9865°N 4.1451°W / 52.9865; -4.1451 (Treforys Deserted Quarry Settlement),
SH560453		 Caernarvonshire 5Post-Medieval/Modern
 CN321
Pont Scethin Pont Scethin Bridge Dyffryn Ardudwy 52°47′32″N 4°01′35″W / 52.7922°N 4.0265°W / 52.7922; -4.0265 (Pont Scethin),
SH634235		 Merionethshire 5Post-Medieval/Modern
 ME126
Pont Dol-y-Moch Bridge Ffestiniog 52°57′22″N 3°57′33″W / 52.9561°N 3.9592°W / 52.9561; -3.9592 (Pont Dol-y-Moch),
SH685416		 Merionethshire 5Post-Medieval/Modern
 ME039
Gold mine Mills Berth-Llwyd & Cefn Coch Gold Mining Complex Mill Ganllwyd 52°47′36″N 3°54′13″W / 52.7932°N 3.9035°W / 52.7932; -3.9035 (Berth-Llwyd & Cefn Coch Gold Mining Complex),
SH717233		 Merionethshire 5Post-Medieval/Modern
 ME119
Hermon or Dolfwynog Copper/Gold Bog Kiln Kiln Ganllwyd 52°48′43″N 3°52′18″W / 52.812°N 3.8716°W / 52.812; -3.8716 (Hermon or Dolfwynog Copper/Gold Bog Kiln),
SH739254		 Merionethshire 5Post-Medieval/Modern
 ME198
Cwm Heisian West Lead and Gold Mine Mill Ganllwyd 52°50′03″N 3°52′34″W / 52.8343°N 3.876°W / 52.8343; -3.876 (Cwm Heisian West Lead and Gold Mine),
SH737279		 Merionethshire 5Post-Medieval/Modern
 ME204
Pont Llanbedr Bridge Llanbedr 52°49′13″N 4°06′02″W / 52.8203°N 4.1006°W / 52.8203; -4.1006 (Pont Llanbedr),
SH585268		 Merionethshire 5Post-Medieval/Modern
 ME026
Dinorwig quarry Dinorwic Quarry: Hafod Owen Winding Engine, Locomotive Shed, Main Waterwheel and Housing Wheelhouse Llanddeiniolen 53°07′13″N 4°06′55″W / 53.1203°N 4.1154°W / 53.1203; -4.1154 (Dinorwic Quarry: Hafod Owen Winding Engine, Locomotive Shed, Main Waterwheel and Housing),
SH585602		 Caernarvonshire 5Post-Medieval/Modern
 CN163
Dinorwic Quarry Barracks 'A' Incline Barracks Llanddeiniolen 53°07′12″N 4°06′39″W / 53.12°N 4.1108°W / 53.12; -4.1108 (Dinorwic Quarry Barracks 'A' Incline),
SH586601		 Caernarvonshire 5Post-Medieval/Modern
 CN177
Vivian Slate Quarry, Inclines, Walia & associated structures Incline Llanddeiniolen 53°07′28″N 4°06′51″W / 53.1244°N 4.1141°W / 53.1244; -4.1141 (Vivian Slate Quarry, Inclines, Walia & associated structures),
SH586606		 Caernarvonshire 5Post-Medieval/Modern
 CN198
Dinorwic Quarry Slate mill Llanddeiniolen 53°07′25″N 4°05′48″W / 53.1236°N 4.0966°W / 53.1236; -4.0966 (Dinorwic Quarry),
SH597605		 Caernarvonshire 5Post-Medieval/Modern
 CN337
Pont Fawr Pont Fawr Bridge Llandderfel 52°55′02″N 3°30′56″W / 52.9171°N 3.5155°W / 52.9171; -3.5155 (Pont Fawr),
SH982366		 Merionethshire 5Post-Medieval/Modern
 ME027
Dinas Dinlle Seagull Trench Seagull Trench Llandwrog 53°04′59″N 4°20′07″W / 53.0831°N 4.3354°W / 53.0831; -4.3354 (Dinas Dinlle Seagull Trench),
SH436565		 Caernarvonshire 5Post-Medieval/Modern
 CN396
Slate Gwaliau at Felin Fawr, Penrhyn Wall Llandygai 53°10′37″N 4°04′26″W / 53.1769°N 4.074°W / 53.1769; -4.074 (Slate Gwaliau at Felin Fawr, Penrhyn),
SH614664		 Caernarvonshire 5Post-Medieval/Modern
 CN297
Ogwen Fish Weir Fish weir Llandygai 53°14′25″N 4°05′39″W / 53.2404°N 4.0943°W / 53.2404; -4.0943 (Ogwen Fish Weir),
SH600730		 Caernarvonshire 5Post-Medieval/Modern
 CN335
Cegin Viaduct (Penrhyn Railroad) Viaduct Llandygai 53°13′48″N 4°06′35″W / 53.2299°N 4.1098°W / 53.2299; -4.1098 (Cegin Viaduct (Penrhyn Railroad)),
SH592723		 Caernarvonshire 5Post-Medieval/Modern
 CN380
Pont Llanelltyd Llanelltyd Bridge Bridge Llanelltyd 52°45′22″N 3°54′04″W / 52.7562°N 3.901°W / 52.7562; -3.901 (Llanelltyd Bridge),
SH718193		 Merionethshire 5Post-Medieval/Modern
 ME006
Water Powered Chain Incline at Bryneglwys Slate Quarry Water Power System Llanfihangel-y-Pennant 52°37′44″N 3°55′55″W / 52.6289°N 3.9319°W / 52.6289; -3.9319 (Water Powered Chain Incline at Bryneglwys Slate Quarry),
SH693052		 Merionethshire 5Post-Medieval/Modern
 ME186
Alltwyllt Slate Quarry Incline Incline Llanfihangel-y-Pennant 52°38′27″N 3°57′01″W / 52.6407°N 3.9503°W / 52.6407; -3.9503 (Alltwyllt Slate Quarry Incline),
SH681065		 Merionethshire 5Post-Medieval/Modern
 ME205
Rhosydd Incline, Drumhouse & Tramway Industrial monument Llanfrothen 52°59′52″N 4°00′05″W / 52.9977°N 4.0013°W / 52.9977; -4.0013 (Rhosydd Incline, Drumhouse & Tramway),
SH657463		 Merionethshire 5Post-Medieval/Modern
 ME142
Corn Drying Kiln Near Carn-Gadell Uchaf Kiln Llangelynin 52°39′18″N 4°05′14″W / 52.655°N 4.0871°W / 52.655; -4.0871 (Corn Drying Kiln Near Carn-Gadell Uchaf),
SH589084		 Merionethshire 5Post-Medieval/Modern
 ME116
The Holyhead Road: the Ogwen Pass Road Llanllechid 53°07′39″N 4°01′21″W / 53.1276°N 4.0226°W / 53.1276; -4.0226 (The Holyhead Road: the Ogwen Pass),
SH647608		 Caernarvonshire 5Post-Medieval/Modern
 CN338
Drws y Coed Copper Mine Copper mine Llanllyfni 53°03′29″N 4°10′15″W / 53.0581°N 4.1707°W / 53.0581; -4.1707 (Drws y Coed Copper Mine),
SH546534		 Caernarvonshire 5Post-Medieval/Modern
 CN162
Dorothea pumping engine Dorothea Quarry Beam Engine Engine house Llanllyfni 53°03′15″N 4°14′37″W / 53.0542°N 4.2435°W / 53.0542; -4.2435 (Dorothea Quarry Beam Engine),
SH497531		 Caernarvonshire 5Post-Medieval/Modern
 CN165
Dorothea Quarry, Pyramids, Inclines, Mill & Winding Houses, etc. Engine house Llanllyfni 53°03′13″N 4°14′21″W / 53.0537°N 4.2393°W / 53.0537; -4.2393 (Dorothea Quarry, Pyramids, Inclines, Mill & Winding Houses, etc),
SH500530		 Caernarvonshire 5Post-Medieval/Modern
 CN199
Pen-yr-Orsedd Quarry, Blondins and Associated Structures Engine house Llanllyfni 53°03′49″N 4°13′35″W / 53.0635°N 4.2265°W / 53.0635; -4.2265 (Pen-yr-Orsedd Quarry, Blondins and Associated Structures),
SH509541		 Caernarvonshire 5Post-Medieval/Modern
 CN208
Ty Mawr East Slate Quarry Winding Engine House Engine house Llanllyfni 53°02′57″N 4°14′27″W / 53.0492°N 4.2407°W / 53.0492; -4.2407 (Ty Mawr East Slate Quarry Winding Engine House),
SH499525		 Caernarvonshire 5Post-Medieval/Modern
 CN300
Blaen y Cae Slate Quarry Unclassified site Llanllyfni 53°03′33″N 4°14′35″W / 53.0591°N 4.243°W / 53.0591; -4.243 (Blaen y Cae Slate Quarry),
SH497536		 Caernarvonshire 5Post-Medieval/Modern
 CN301
Cloddfa'r Lon Slate Quarry Slate mill Llanllyfni 53°03′23″N 4°14′08″W / 53.0564°N 4.2356°W / 53.0564; -4.2356 (Cloddfa'r Lon Slate Quarry),
SH503534		 Caernarvonshire 5Post-Medieval/Modern
 CN302
Old Stone Bridge over the Afon Taihirion - geograph.org.uk - 98948.jpg
 Pont Tai-Hirion Old Bridge Bridge Llanycil 52°56′33″N 3°46′56″W / 52.9424°N 3.7821°W / 52.9424; -3.7821 (Pont Tai-Hirion Old Bridge),
SH803398		 Merionethshire 5Post-Medieval/Modern
 ME028
Capel Gallt-Coed Chapel Llanystumdwy 52°56′18″N 4°16′37″W / 52.9382°N 4.277°W / 52.9382; -4.277 (Capel Gallt-Coed),
SH470402		 Caernarvonshire 5Post-Medieval/Modern
 CN117
Afon Cynfal Deserted Rural Settlement Rectangular hut settlement Maentwrog 52°57′17″N 3°51′35″W / 52.9547°N 3.8597°W / 52.9547; -3.8597 (Afon Cynfal Deserted Rural Settlement),
SH751413		 Merionethshire 5Post-Medieval/Modern
 ME190
Afon Goch Deserted Rural Settlement Longhouse Maentwrog 52°57′00″N 3°51′30″W / 52.9501°N 3.8582°W / 52.9501; -3.8582 (Afon Goch Deserted Rural Settlement),
SH753407		 Merionethshire 5Post-Medieval/Modern
 ME191
Pont Minllyn, Afon Dyfi Pont Minllyn Property in the care of Cadw Bridge Mawddwy 52°42′38″N 3°41′21″W / 52.7106°N 3.6891°W / 52.7106; -3.6891 (Pont Minllyn),
SH859138		 Merionethshire 5Post-Medieval/Modern
 ME094
Dovey Bridge, Machynlleth Machynlleth Bridge Bridge Pennal, (also Machynlleth), (see also Powys) 52°36′02″N 3°51′21″W / 52.6005°N 3.8557°W / 52.6005; -3.8557 (Machynlleth Bridge),
SH744019		 Also known as Pont ar Dyfi Merionethshire 5Post-Medieval/Modern
 MG002
Cei Tyddyn Isa Quarry Penrhyndeudraeth 52°56′05″N 4°02′28″W / 52.9348°N 4.0412°W / 52.9348; -4.0412 (Cei Tyddyn Isa),
SH629395		 Merionethshire 5Post-Medieval/Modern
 ME108
Pen-y-Gwryd Pillboxes Pillbox Beddgelert 53°04′48″N 4°00′13″W / 53.0799°N 4.0036°W / 53.0799; -4.0036 (Pen-y-Gwryd Pillboxes),
SH659555		 Caernarvonshire 5.9Post-Medieval/Modern
 CN397
Dragon's teeth, Fairbourne beach defences Fairbourne Anti-invasion Defences Anti-invasion defence site Arthog 52°41′54″N 4°03′26″W / 52.6983°N 4.0571°W / 52.6983; -4.0571 (Fairbourne Anti-invasion Defences),
SH610131		 The tank traps stretch for some 3 kilometres (1.9 mi) along the beach Merionethshire 5.9Post Medieval/Modern
 ME252
Anti-invasion Defences 630m E of Cae'r-tyddyn Anti-tank Obstacle Brithdir and Llanfachreth 52°44′23″N 3°47′07″W / 52.7396°N 3.7854°W / 52.7396; -3.7854 (Anti-invasion Defences 630m E of Cae'r-tyddyn),
SH795172		 Merionethshire 5.9Post-Medieval/Modern
 ME250
Nant Ffrancon Anti-invasion Defences Anti-invasion defence site Llandygai, (also Capel Curig), (see also Conwy) 53°07′31″N 4°01′20″W / 53.1252°N 4.0222°W / 53.1252; -4.0222 (Nant Ffrancon Anti-invasion Defences),
SH647605		 Caernarvonshire 5.9Post-Medieval/Modern
 CN399
Anti-invasion Defences 2000m NE of Cwmrhwyddfor Farm Anti-tank Obstacle Llanfihangel-y-Pennant 52°42′13″N 3°50′57″W / 52.7036°N 3.8492°W / 52.7036; -3.8492 (Anti-invasion Defences 2000m NE of Cwmrhwyddfor Farm),
SH751133		 Merionethshire 5.9Post-Medieval/Modern
 ME251


See also

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List of Roman-to-modern scheduled monuments in Gwynedd Facts for Kids. Kiddle Encyclopedia.