Best Free Midwest Attractions: Indiana

Falls of the Ohio State Park, Clarksville You can see one of the largest naturally exposed fossil beds along the Ohio River in Clarksville (about 100 miles southwest of Cincinnati, just across the river north of Louisville, Kentucky).

Fossil collecting is not allowed, but you can explore up to 220 acres of fossil beds. Naturalists lead hikers across the beds from June through October, when the river is low and you can see the imprints of creatures from more than 380 million years ago.

For a fee, you can also visit the blufftop Interpretive Center, which shows a movie recounting the area's history.

Falls of the Ohio State Park