Rich in history and folklore. A young geologic formation, only a few million years old. Bones of elephant, bison, bear, deer, other animals have been found here. When white men came to area in 1840's, Indians knew the caverns; Rangers once found and rescued a kidnapped girl from Indians in "Council Room."
During Civil War (1861-1865) gunpowder was manufactured and stored here. In 1870's outlaws, including the Sam Bass gang, sometimes lived in the cavern.
Site of night club in 1920's.
Has many unique features. Was opened to public in 1932.