The Sierra Nevada Mountains are famous for their caverns. Experience our incredible caves, many discovered by gold miners in their determined search for the elusive metal. Visitors are always surprised by how many amazing caverns are hidden within the Sierra. Rapelle down a cavern cliff. Listen to the faint plish-plash as limestone drips add to the amazing diversity of stalactites and stalagmites that form in fantastic sculptures throughout the caves. Marvel at how cool the caves are, even on the hottest summer days. Under the expert leadership of a highly trained guide, you’ll explore these hidden marvels and see a whole new “underside” to the Sierra. We’ll arrange the entire tour, from start to finish.