Natural Bridge Caverns

State: Texas. Type: show cave / commercial cavern attraction in Comal County, near San Antonio in the Texas Hill Country. Discovered March 27, 1960, opened to the public July 3, 1964. Designated a U.S. National Natural Landmark in 1971. Billed as the largest commercial caverns in Texas; still family-owned and operated. Address: 26495 Natural Bridge Caverns Rd, San Antonio, TX 78266.

Natural Bridge Caverns is a large, commercially operated cave system in the Texas Hill Country north of San Antonio, named for the 60-foot limestone bridge that spans the entrance amphitheater where a sinkhole once collapsed. Four St. Mary's University students discovered the caverns in March 1960 and mapped just over a mile of passages; the site opened to paying visitors in 1964 after several years of development. Inside, guided tours descend about 180 feet below the surface through chambers decorated with stalactites, stalagmites, columns and flowstone, formed as rainwater slowly dissolved the surrounding limestone. The cave holds a constant 70°F temperature and 99% humidity year-round, offering a cool break from the Hill Country heat. Beyond the cave tours, the property has grown into a broader family attraction with a zipline course, a maze, gem-mining activity and a seasonal bat-flight program, and it sits next to the separately operated Natural Bridge Wildlife Ranch drive-through safari park.

The caverns are located at 26495 Natural Bridge Caverns Rd, San Antonio, TX 78266, in Comal County in the Texas Hill Country, roughly north of downtown San Antonio. The site sits adjacent to the Natural Bridge Wildlife Ranch, a separately operated drive-through safari park.

The surrounding Hill Country has a humid subtropical climate with hot summers and mild winters, but inside the caverns themselves conditions are constant year-round: about 70°F with roughly 99% humidity, per the cave's own description. This makes a cavern tour a consistent experience regardless of the season or weather outside.

Because the cave interior stays a constant 70°F year-round, cavern tours are a comfortable option in any season, including the height of Hill Country summer heat. Above ground, spring and fall bring milder weather for the property's outdoor activities such as the zipline and maze, while the seasonal Bracken Bat Flight & Cave Tour and Christmas at the Caverns events are tied to specific times of year.

Four St. Mary's University students, Orion Knox Jr., Preston Knodell Jr., Al Brandt and Joe Cantu, discovered the caverns on March 27, 1960, initially mapping just over a mile of passages. Development began in 1963, and the site officially opened to the public on July 3, 1964. The caverns were designated a U.S. National Natural Landmark in 1971. Archaeological evidence points to early human presence in the area dating back to roughly 5000 BCE. Exploration has continued long after the original discovery: since May 2019, cavers have found more than 1,600 feet of previously unknown passages, and unexplored sections are known to reach depths of around 230 feet, deeper than the 180-foot public tour route.

The core experience is a guided walking tour through the cavern's decorated passages, with options including the Discovery Tour, the Hidden Wonders tour, and a Combo Tour covering both cave sections, plus a Lantern Tour for a different lighting experience. Above ground, the property offers the Twisted Trails zipline course, the AMAZEn' Ranch Roundup maze, and gem-and-fossil mining. A seasonal Bracken Bat Flight & Cave Tour lets visitors watch bats emerge at dusk, and the site hosts seasonal events such as Christmas at the Caverns, Yoga Underground and Live Underground music/comedy nights inside the cave itself.

The cavern's showpiece is the 60-foot natural limestone bridge over the entrance amphitheater, which gives the site its name. Inside, decorated chambers display stalactites, stalagmites, columns and flowstone formations reaching down to about 180 feet below the surface on the public route. The adjacent, separately operated Natural Bridge Wildlife Ranch drive-through safari park is a common add-on for visitors extending their day.

The caverns sit north of San Antonio in Comal County; San Antonio International Airport is the nearest major commercial airport, with a rental car or rideshare needed to reach the site since it is outside the city's core public transit network. Driving is the standard way to arrive, via the Hill Country roads north of San Antonio.

The caverns operate on seasonally varying hours listed on the official site's hours-and-pricing pages; specific tour times should be confirmed directly with Natural Bridge Caverns before visiting, as exact current hours were not captured from the pages fetched for this research.

Tour pricing is tiered by tour type (Discovery Tour, Hidden Wonders, Combo Tour, Lantern Tour) with online early-booking discounts encouraged by the operator; specific current adult, child and senior rates were not confirmed directly from the official pricing page during this research and should be checked at naturalbridgecaverns.com/pricing before publishing. Yoga Underground and Live Underground event tickets were listed at $44.99 per person on the official site.

A standard single cavern tour runs roughly an hour; visitors adding the zipline, maze, gem mining or a stop at the neighboring Wildlife Ranch should plan for a half-day to a full day on the combined property.

San Antonio, a short drive south, offers the full range of hotel chains, downtown hotels and vacation rentals typical of a major city. Closer to the caverns, the Hill Country towns north of San Antonio have a smaller stock of inns and bed-and-breakfasts for visitors who prefer to stay outside the city.

The caverns site itself offers food and beverage service and a gift shop for visitors during their tour. Beyond the property, San Antonio's wider dining scene, including Tex-Mex, barbecue and River Walk-area restaurants, is a short drive south for a fuller range of options.

The Natural Bridge Wildlife Ranch, a drive-through safari park, sits directly adjacent and is a popular pairing with a caverns visit. San Antonio's broader attractions, including the River Walk and the Alamo, are within a reasonable drive for visitors extending their trip.

San Antonio International Airport is the nearest commercial airport. There is no dedicated public transit line to the caverns, so a rental car or rideshare is the practical way to reach the site from San Antonio.

Cave tours involve walking on potentially damp, uneven surfaces roughly 180 feet below ground, so sturdy closed-toe shoes are recommended. The zipline and maze activities may carry their own height, weight or health restrictions; check current requirements before booking. For any emergency, dial 911.

A light jacket or sweater is useful for the cave's constant, cooler interior temperature even on a hot Hill Country day, along with closed-toe walking shoes for uneven cave surfaces. Sun protection is worth carrying for time spent on the above-ground portions of the property.

Booking tour tickets online in advance is recommended by the operator, since prices are described as rising (not falling) as dates approach and popular tour times can sell out. Pairing a caverns tour with a stop at the neighboring Natural Bridge Wildlife Ranch makes for an efficient combined outing. Check the seasonal calendar before visiting if you're hoping to catch the Bracken Bat Flight tour or Christmas at the Caverns event, since these run only at specific times of year.

Dial 911 for any emergency. For general visitor questions, Natural Bridge Caverns can be reached at 210-651-6101 or caverninfo@naturalbridgecaverns.com, per its official site.

Natural Bridge Caverns - https://naturalbridgecaverns.com

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.