Mammoth Cave

Mammoth Cave, Historical Entrance

With nearly 350 miles of mapped cave, Mammoth Cave is the longest known cave in the world. It is estimated that over 600 miles of unexplored cave may yet be discovered. Situated in the Mississippian Ste. Genevieve, St. Louis, and Girkin Formations, the cave boasts spectacular features such as the "Frozen Niagara", a calcium carbonate dripstone formation, and the "Snowball Room", a cavern with snowball-shaped calcium carbonate concretions covering the ceiling.