Natural Bridge Caverns
near New BraunfelsThe largest commercial cavern in Texas — more than 200 feet down, with big rooms and a full canopy-and-mining complex above ground for kids.
Experience
Caves & the Underground
Everything good about the Hill Country above ground — the springs, the clear rivers, the swimming holes — is a side effect of what the water did underground first.
The lay of the land
Rain falls on the Edwards Plateau, picks up carbon dioxide, turns mildly acidic, and spends a few hundred thousand years dissolving limestone. What it leaves behind is the Edwards Aquifer, the springs that feed every swimming hole in this guide, and a whole floor of caves under the ranch country.
A handful are open to visitors, and they are a genuinely good hot-weather play: it is in the sixties down there in August, the tours are short, and the geology is spectacular. Several also double as concert venues, which is exactly as strange and wonderful as it sounds.
Where to go
Featured spots
Longhorn Cavern State Park
Burnet CountyCarved by an underground river rather than dripwater, so it reads as a smooth stone hallway. CCC-built entrance; a mile-and-a-quarter walking tour.
Cave Without a Name
near BoerneA National Natural Landmark with six big rooms of living formations and a Throne Room used for concerts. Named by a local kid who said it was too pretty to name.
Colorado Bend State Park
north of LlanoGuided wild-caving trips — helmets, headlamps, and crawling. The real thing, by reservation.
Old Tunnel State Park
near FredericksburgNot a cave, but an abandoned railroad tunnel that three million bats treat like one. See the bats experience.
Know before you go
A few good tips
- It is 68°F underground year-round — a cave tour is the best midday move in July and August.
- Wear real shoes. Cave floors are wet, uneven, and occasionally steep.
- Book ahead in summer and on holiday weekends; tour groups are capped.
- Skip the tripod — most caves ban them, and handheld is fine with modern phones.
- Five Texas caves run a shared passport program if you want to make a project of it.
Plan it properly
Book it with the source
Hours, fees, and closures change. These are the people who set them.
- Natural Bridge Caverns
Tours, tickets, and the above-ground adventure park.
- Longhorn Cavern State Park
TPWD — walking tours and CCC history.
- Cave Without a Name
City of Boerne’s page on the cave and its concerts.
- Colorado Bend State Park
Guided wild-cave trips and Gorman Falls.
Where to base
Destinations for this
Boerne
29.795°N 98.732°WKendall County
A German-founded town on Cibolo Creek with a Hill Country Mile of shops, a 100-acre nature center, and a cathedral-sized cave ten minutes out of town.
Marble Falls & the Highland Lakes
30.578°N 98.273°WBurnet County
A chain of dammed Colorado-River lakes ringed by granite hills — boating, lakeside dining, and the spring carpet of bluebonnets at Muleshoe Bend.
Gruene & New Braunfels
29.738°N 98.104°WComal County
A 19th-century river town wrapped around the oldest dance hall in Texas, with the Guadalupe and the spring-fed Comal running right past the door.
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