Wind Cave National Park



If you don't get out of your car at Wind Cave, you haven't scratched the surface—literally. The park has more than 145 miles of underground passageways. Curious cave formations include 95% of the world's mineral boxwork, and gypsum beard so sensitive it reacts to the heat of a lamp. This underground wilderness is part of a giant limestone labyrinth beneath the Black Hills. Wind Cave ranks as the sixth-longest cave in the world, but experts believe 95% of it has yet to be mapped.

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