In the 360 million years since the Blackhand sandstone of Hocking Hills State Park served as
a river delta, weathering and erosion have created deep caves and recesses within the thick stone.
Humans first inhabited the hollows of Hocking Hills more than 7,000 years ago, but the 2,350-acre park's Old Man's Cave is named for a hermit who occupied it around the turn of the 19th century. From Old Man's Cave, hikers have the perfect view of the larger waterfall, Middle Falls, and can watch the creek's clear water ripple and roll down the sandstone ledges.
Also visible from Old Man's Cave is the Devil's Bathtub, a "tub" of water that spills over into Clear Creek. The cave also marks the start of a six-mile hike connecting Old Man's Cave to Cedar Falls and the hulking horseshoe-shaped Ash Cave, where water plunges over the rim into a pool below.
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In the 360 million years since the Blackhand sandstone of Hocking Hills State Park served as 
