Spelunking

Natural Bridge Caverns. Trek down 180 feet below the earth's surface for a half-mile walk through this beautiful, historic cavern system. Visitors can take the popular North Cavern tour for a look at stalagmites, stalactites, flowstones, chandeliers, and soda straw formations. The Jaremy Room encompasses two huge underground chambers that use both light and dark to showcase rare formations. 26495 Natural Bridge Cavern Rd., San Antonio, Texas, 78266. 210/651--6101; www.naturalbridgecaverns.com. $22.99. Daily 9–4, 5, 6, or 7, depending on season.