Everything is bigger in Texas, including the caverns. See the Natural Bridge Caverns, the largest of its kind in the Lone Star State, near San Antonio on a guided walking tour. An experienced and informative guide leads your group through this National Natural Landmark, revealing the science and history behind the magical underground rock formations along the way.

The 75-minute tour takes visitors 180 feet (55 m) underground to discover cavernous hallways and rooms highlighted by otherworldly stone structures that were only discovered in 1960. Throughout the nearly mile-long (1 km) walk, you’ll see “fried-egg” speleothems that seem to drip from the ceiling.

After the subterranean tour, partake in some of the above-ground activities (own expense) on the grounds. Soar above Texas Hill Country on one of two ziplines; race through the AMAZEn’ Ranch Roundup; or test your stamina on a circuit of ropes, planks, and stairways on the Canopy Explorer Course.

And if you don’t feel you’ve got your money’s worth yet, pan for gold, gemstones, arrowheads and fossils at the Natural Bridge Caverns Mining Sluice. You never know what you might unearth!