Discover California's largest single vertical chamber in a public cavern. Describes family and adventure tours available, hours, other activities, prices, and map and directions to location near Vallecito.

First cave in the state to be opened to the public for guided tours. Includes descriptions of walking tours and expeditions available, lists other activities, prices, and a map and directions to location east of Mountain Ranch.

Designated a National Natural Landmark in 1976, features a fifty-minute tour to view rare helictite formations. Includes hours, tour prices, map and direction to location in Volcano, California.