From Ohio History Central
Old Man's Cave is part of the Hocking Hills State Park near Logan, Ohio. The cave is one of Ohio's most popular natural history attractions.
Old Man's Cave is located in a gorge of Black Hand Sandstone. Thousands of years of erosion, principally caused by glaciation and Salt Creek, which flows through the gorge, resulted in the cave. Sandstone is a very porous substance and much more susceptible to erosion than many other types of rocks. While Old Man's Cave is relatively small, the gorge, itself, extends for approximately one-half mile. The gorge also reaches a depth of approximately 150 feet at its deepest point. Various forms of plant life, most notably hemlock, black birch, and Canadian yew, thrive in the gorge.
In 1924, the State of Ohio purchased 146 acres of land in the Hocking Hills. This purchase included Old Man's Cave. First owned and operated by the Ohio Department of Forestry, in 1949, the Ohio Department of Natural Resources and the Ohio Division of Parks assumed control of Old Man's Cave.
[[Category:Natural History Geography]]