In 1992, Mound City Group was renamed and expanded as Hopewell Culture National Historical Park. Its definition included remnants of four other nearby earthwork and mound systems. Two Ross County sites are within a few miles of Mound City and open to the public. Seip Earthworks is located west of Chillicothe on U.S. Route 50. Hopewell Mound Group is the site of the 1891 excavation on the land of Mordecai Hopewell (for whom the culture is named). Hopeton Earthworks located across the Scioto River from Mound City and High Bank Works, which is closed to the public.