Immerse yourself within the third longest cave in the world. With over 192 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. Truly a jewel in the National Park Service.
https://www.nps.gov/jeca/index.htm
11149 US-16 B-12, Custer, SD 57730