Jewel Cave National Monument

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Murray Foubister
Jewel Cave National Monument is in the Black Hills of South Dakota. The cave is the third longest known cave in the world, and going. In 2006 more than 136 mi (219 km) of passage have been surveyed. The cave was named after the large amounts of calcite (calcium carbonate) crystals found in the cave. The cave offers plenty of underground beauty, however, offers a variety of things to do on the surface.


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