Jewel Cave National Monument, Custer, South Dakota, USA
Immerse yourself within the third longest cave in the world. With over 180 miles of mapped and surveyed passages, this underground wilderness appeals to human curiosity. Its maze of passages lure explorers, and its scientific wealth remains a mystery.
Its splendor is revealed through fragile formations and glimpses of brilliant color. This resource is truly a jewel in the National Park Service.
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