Fodor's Expert Review Black Hills Caverns
Rapid City
Cave
Amethysts, logomites, calcite crystals, and other specimens fill this 60-million-year-old, privately owned cave, formed slowly by water trickling through limestone rock and first documented by gold seekers in 1882. Half-hour and hour-long walking tours, as well as gemstone and fossil mining, are available. Tours depart approximately every 20 minutes.
