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Black Chasm Cavern was designated a National Natural Landmark by the National Park Service in 1976. The 50-minute walking tour follows a series of environmentally friendly stairs and walkway that lead you underground. The cave tour culminates in the Landmark Room, famous for an amazing collections of sparkling crystals. You'll see a wide variety of formations include stalactites, stalagmites, flowstones and the vast arrays of rare helictite crystals, for which Black Chasm Cavern is famous for.
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