Cave & Mine Adventures provides year-round fun! Moaning Cavern is just minutes away from Gold Country in Vallecito, CA. The walking tour descends 165 feet into the largest single-chambered cavern in California. Since the cavern is vertical, the tour requires going down and then back up 234 steps. Gift certificate is for a family (up to 5 people) for a walking tour at Moaning Cavern.