California Cavern State Historic Landmark


California Cavern has the mother lode’s most extensive system of natural underground caverns. Regular tours take 60 to 80 minutes, or get a group together and reserve ahead for a three- to five-hour ‘Middle Earth Expedition’ ($130), which includes some serious spelunking (no children under age 16 allowed). The Trail of Lakes walking tour, available only during the wet season in winter and spring, is magical.


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