The Newark Earthworks were the largest set of geometric earthen enclosures in the world. Built by prehistoric Hopewell people between 100 BC and AD 500, this architectural wonder of ancient America was part cathedral, part cemetery and part astronomical observatory. The Earthworks originally covered more than four square miles, and more than seven million cubic feet of earth were used in their construction.
The 2006 designation of the Newark Earthworks as Ohio’s state prehistoric monument honors the ancient American Indian builders of this incredible site. The Newark Earthworks are also recognized as a National Historic Landmark.