6123 SR 350, Oregonia, Ohio 450541-800-283-8904
A National Historic Landmark, this 100-acre earthen enclosure near Lebanon is part of a 764-acre park that features vestiges of two prehistoric Native American cultures: the Hopewell and the Fort Ancient peoples. This important archaeological site offers a museum, hiking trails and many scenic views of the surrounding countryside. SR 350, 7 mi. southeast of Lebanon, Ohio.