Exploring the Unknown

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Duration:
4 minutes, 32 seconds

Although Jewel Cave showcases over 200 miles of mapped and surveyed passages, we believe that this only represents about three percent of the cave's total volume. With assistance from volunteer cavers, this beautiful resource is explored, and more passages are added to the map. Follow along as a caving team heads into the unknown.

 

Last updated: November 21, 2025

Contact Info

Mailing Address:

11149 U.S. Hwy. 16
Building B12
Custer, SD 57730

Phone:

605 673-8300
The main phone line connects visitors with staff at the visitor center. Throughout the year, the phone line is monitored by staff on a daily basis, excluding holidays and days with limited visitor services. Please be advised that after-hours messages are not taken on the system; visitors are encouraged to call the visitor center during normal operations and speak with a park ranger for assistance.

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