California's first show cave! Offering 60-80 minute Trail of Lights family walking tour, the 2-hour Mammoth Cave Expedition & the 4-hour Middle Earth Expedition. Open spring through fall. School program and Corporate Team Building available.

Discovered in 1885. One of the crown jewels of the Gold Country. World renowned for rare aragonite flos ferri. 45 min. guided tour takes you into a wondrous world of beautiful and delicate cave formations. Open daily.