Features combination boat and bus ride to the entrance. Includes photos of formations, history, direction map, hours, area activities and contact information. Gift shop and gem mining on premises. Located in O'Brien.

Offers 45-minute guided tour. Includes photo gallery, history, maps, admission fees, discount coupon, hours, links and contact information. Located near Murphys.

Runs five underground adventure locations: Black Chasm, Boyden Cavern California Cavern, Moaning Cavern and Sutter Gold Mine.