SAN ANTONIO – Natural Bridge Caverns are the largest known caverns in Texas.
The caverns were discovered by four students from St. Mary’s University.
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On March 27, 1960, on their fourth trip down, students Orion Knox Jr., Preston Knodell, Al Brandt and Joe Cantu discovered the caverns. A day they refer to as the "day of discovery."
Some of the cave rooms are as big as a football field, and temperatures are consistently around 70 degrees year-round.
Public tours are available through the caverns, with the deepest part of the tour going approximately 180 feet below the surface. This is equivalent to a 180-story building.
Fun fact? Stone tools -- including scrapers, gouges, knives and drill fragments -- dating back 10,000 years have been found in the caverns.
- Discovery Tour – The original cavern tour
- Hidden Passages Tour – Another amazing cavern
- Lantern Tour – Cave tour by hand-held lanterns
- Adventure Tours – Undeveloped cave spelunking tours
- Canopy Challenge – Vertical obstacle and zip adventures
- Gem and Fossil Mining – Pan for gems, minerals and fossils
- Maze – An open air maze challenge
- Bracken Bat Flight – World’s largest bat emergence