Discover Buried Treasure
At 145 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:
145.17 miles.
On May 3, 2009 cavers spent 9 hours underground and mapped 491.05 feet of cave passages.
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