Jewel Cave National Monument

Jewel Cave

Jewel Cave National Monument

Located near Custer, South Dakota, Jewel Cave is recognized as the second longest recorded cave system in the nation - 181 miles - behind only the appropriately...
Caves

Caving in the Black Hills

Deep under the ponderosa pine forests and sprawling prairies of the Black Hills, there is an underground world of tunnels filled with unique geological formatio...