Sitting Bull Crystal Caverns  
13745 South Highway 16
Rapid City, SD 57701
605-342-2777

Filled with subterranean, crystalline passages in Paha Sapa limestone, this site offers 45-minute tours of the world's most extensive display of dog-tooth spar crystal, including such special sites as the Chandelier Room, Crystal Palace, Rainbow Arch and the Diamond Lake that features clear, still water reflecting a grandiose crystal ceiling.