Leo Petroglyph is an outstanding example of prehistoric Indian inscriptions.

On the edge of a beautiful ravine, the sandstone petroglyph contains 37 incised drawings of humans, animals, and human and animal footprints. It is now protected by a roof and viewing platform. The carvings, whose meaning is unknown, are attributed to Fort Ancient Indians who occupied this area between AD 1000 and 1650.

A trail leads through the gorge and along the unglaciated Mississippian sandstone cliffs that are 20 to 65 feet high. Wildflowers and birds are abundant during the warmer months.