United States of America
California Cavern is a limestone cave in the Sierra Nevada foothills, in Cave City, Calaveras County, California. The series of interconnected caverns are one of the earliest officially recorded caves in the Mother Lode region of California. Although one of numerous caves in the Mother Lode region,
California Caverns claims the distinction of having the most extensive system of caverns and passageways.
Listen to the audio guide for California Caverns Free on WIP — starts by itself when you arrive, even with the screen off