The Octagon Earthworks consist of a circular earthen enclosure connected to an octagonal enclosure by a short segment of parallel walls. The Octagon Earthworks formed one part of the Newark Earthworks, the largest set of geometric earthworks built by the Hopewell culture (100 B.C. to 500 A.D.) of pre-contact American Indian people. The circle encloses about 20 acres and the octagon about 50 acres. The Octagon Earthworks is Ohio’s first UNESCO World Heritage site.
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