Discover Buried Treasure
At 146 miles, Jewel Cave is the second longest cave in the world. It is filled with calcite crystals and other wonders that make up the "jewels" of Jewel Cave National Monument.
The current length of Jewel Cave is:
146.36 miles.
On August 25, 2009 cavers spent 3 hours underground and discovered 57 feet of cave passages.
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