Image: End of a ditch at the Great Circle in Newark

Description: Opening of a ditch on the southern side of the gate to the Great Circle Earthworks in Newark, Ohio, United States; note the nearby person for scale. Along with the Octagon and Wright Earthworks, the Great Circle was built by prehistoric Hopewellian peoples. The three sets of earthworks compose the Newark Earthworks; they have been designated a National Historic Landmark.
Title: End of a ditch at the Great Circle in Newark
Credit: Own work
Author: Nyttend
Permission: I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No