This dissolution cave has a total of 15,000 feet of passages that formed in marble. While much of the cave is open for touring (tours conducted by the USFS), some is reserved for scientific research due to the existence of important fossils.
The plural in the name is somewhat misleading: the main cave is actually just one big cave of 15,000 feet in total length. Their have been 8 other smaller caves discovered in the area, but they are rather inconsequential in comparison.
Posted by Greg Heil on March 16, 2012
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