Octagon Earthworks is part of the Hopewell Ceremonial Earthworks World Heritage site, a partnership between the Ohio History Connection and the National Park Service that recognizes the ancient brilliance behind the construction of eight sites across Ohio: Octagon Earthworks, Great Circle Earthworks, Mound City Group, Hopeton Earthworks, Hopewell Mound Group, Seip Earthworks, High Bank Works, and Fort Ancient.