Located 13 miles West of Custer, SD and 24 miles East of Newcastle WY on U.S. Hwy 16
Immerse yourself within the third longest cave in the world. With 164.38 miles of mapped and surveyed passages, this underground wilderness appeals to human curiosity. Its splendor is revealed through fragile formations and glimpses of brilliant color. Its maze of passages lure explorers, and its scientific wealth remains a mystery. On 1/10/13, explorers discovered another 90 feet of Jewel Cave.
Visit the Jewel Cave National Monument web site.