The Caverns of Sonora in Sonora, Texas is one of the most beautiful show caves in the world. The cave is located in west Texas right off of Interstate 10 so it is not as well known but should not be missed. This cave has 7 miles of mapped passages and offers almost 2 miles of it on the tour! Guided tours leave the gift shop daily. They also offer a discovery challenge tour that is reservation only. This tour includes a 4 hour caving adventure in full gear and ends with a 45 foot repel into Devil's Pit. for more info check out their website at www.cavernsofsonora.com.