Jewel Cave National Monument Attractions & Activities - The Best Holiday Destinations for 2020
Jewel Cave National Monument is in the Black Hills of South Dakota. The cave is the second longest known cave in the world, and going. In 2006 more than 136 mi (219 km) of passage have been surveyed. The cave received its name 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.
The Most Frequently Asked Travel Questions about Jewel Cave National Monument