Ross County: See
Hopewell Culture National Historical Park in Chillicothe. A group of 23 earthen mounds built by the Hopewell culture, 200 BC to AD 500.
Sugarloaf Mountain Amphitheatre - Tecumseh! in Chillicothe. Huge outdoor stages.
Ohio Caverns, ☏ +1 937-465-4017. Southeast Logan County, south of Bellfontaine and 4 mi (6.4 km) east of West Liberty on SR 245.
Zane Caverns, northeast of Bellfontaine.
If you're interested in visiting museums, Dayton offers the Dayton Art Institute, the Dayton International Peace Museum, the Hoover Historical Center, the National Museum of the U.S. Air Force, and the Wright Cycle Company Complex.
In Chillicothe, you can find the Adena Mansion and Gardens, the Chillicothe Railroad Museum, the Hopewell Culture National Historical Park, the James M. Thomas Telephone Museum, the Dr. John D. Harris Dental Museum, and the Lucy Hayes Heritage Center.