Natural Bridge Caverns are Texas’ largest commercial show caverns, located near San Antonio adjacent to the Natural Bridge Wildlife Ranch safari park. The caverns were discovered in 1960 by St. Mary’s University students and are considered to be living caverns due to their high level of ongoing limestone and calcite development. In 1964, the caverns were developed into a public show cave, and in 1971, they were listed as a National Natural Landmark. Five types of guided tours are offered at the site, highlighting natural wonders such as a 60-foot limestone slab bridge that gives the caverns their name. Other onsite activities include a bat observation tour, a canopy challenge, and a gem mining attraction.

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