Visitors can once again explore the underground water system beneath Natural Bridge Caverns, as the rare Aquifer Tour attraction has unexpectedly returned for the second time in 10 years following massive flooding this week across the Texas Hill Country.
The tour temporarily offers guests a close-up view of the Trinity Aquifer, which lies deep beneath the cave's surface. Typically, the water table of the underground reservoir is too low to be visible, but recent rains have raised the aquifer, giving cave visitors a brief window to see a "spectacular and unique natural phenomenon" within its Discovery passages.
"These high levels of the Trinity Aquifer can drop back down quickly, so book today," the cavern's website reads.
In a video posted to Instagram, Winter D. Prosapio, director of communications for Natural Bridge Caverns, is seen walking through "hip-deep" waters within the mesmerizing underground landscape.
"It looks amazing," she says in the video.
Water levels have risen by approximately 30 feet in a single cave room alone, which visitors can safely view from a special trail. In a few days, she says, the groundwater will become clearer. The last time the tour was available was in late April 2026. Before that, Prosapio told MySA that it had been a decade since the tours were last available.
Natural Bridge Caverns, located just outside of San Antonio, is the largest commercial cave in Texas and offers several cave tours. Guests should call the cavern ahead of time to make sure tours are still available before they arrive.
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