Guides will take you on an incredible journey underground at the largest known cavern in Texas, which has a half-mile of paved trails. View awe-inspiring rock formations that are constantly changing and growing due to the dripping and flowing water. The brave of heart shouldn't miss the flashlight tour of the Jaremy Room, a 120-foot-deep chamber known for its soda straws and delicate formations. If you're claustrophobic, be aware that the underground chambers are connected
by fairly narrow passageways.
Natural Bridge Wildlife Ranch. Next to the caverns you can go on a driving safari at the Natural Bridge Wildlife Ranch, which is home to white rhinos, antelope, kudus, and dozens of other exotic animals from around the world. 26515 Natural Bridge Caverns Rd. 830/438–7400. www.wildliferanchtexas.com. $15.50. Memorial Day–Labor Day, daily 9–6:30; early Sept.–late May, daily 9–5.