Kula Kai Caverns tours and spelunking expeditions. Thousand year old lava tubes in Hawaii. Come let us show you the most natural, natural wonder here in southern Hawaii.

Guided cave tours, underground gold mine tours, underground rappels, advanced and novice adventure spelunking expeditions and more, for experienced cavers and the entire family in four beautiful caverns in California - Black Chasm, Boyden Cavern, California Cavern, Moaning Cavern and one modern hard rock mine in the historic gold country - Sutter Gold Mine. classes caving california