Georgetown, Texas: Inner Space Caverns

Cave exposed in 1963 by Interstate roadbuilding and turned into a commercial attraction. Features the "Lake of the Moon," and the "Flowing Stone of Time."

4200 N. I-35 Frontage Rd, Georgetown, TX
I-35, Exit 259, north of Austin.
Summer M-Sa 9-6, Su 10-6 (Call to verify) Local health policies may affect hours and access.
Adults $21.
RA Rates:
Worth a Detour
Save to My Sights

Visitor Tips and News About Inner Space Caverns

Reports and tips from visitors and Roadside America mobile tipsters. Some tips may not be verified. Submit your own tip.

Inner Space Caverns.

Inner Space Caverns

Awesome experience. Went on a holiday weekend, so there was a bigger group, but so much to see on about an hour tour.

[Sarah, 07/10/2018]
Inner Space Caverns

Amazing! One of the best cavern tours I've been on. It gets pretty warm down there so I recommend shorts.

[Sunnysam, 04/06/2017]

The cave air temperature is a constant 72 F degrees.

Inner Space Cavern

I toured Inner Space often in college, and knew Meredith, who was the first to descend through the drill hole. He was not a highway worker but a caver, called by the highway construction guys to recover the drill bit. He was ecstatic when he looked around that beautiful room! By good luck, both he and the drill bit missed landing on one of the nicest formations.

In 1970 I went with cavers led by Meredith into back of the cave for mapping. I wonder if that part is open to tourists now? Inner Space is a real jewel of a cave!

[PixelAnnie, 04/03/2017]

Inner Space.

Inner Space Caverns

If you go late on a Monday to Inner Space Caverns, you may end up with a personal one on one tour -- we did -- was awesome!

[Annie, 06/15/2016]

Formations in Inner Space Caverns.

Inner Space Caverns

Just visited this cavern again and it's well worth the stop. The tour guides are friendly and very knowledgeable. If you phone before you arrive, they'll tell you which hours of that day should help you avoid mass tour groups of elementary school kids. Well-stocked gift shop. Depending on the time of year, you may get to see hibernating bats. They do turn off all the lights momentarily at one point during the underground tour, so be prepared for DARK. Wear comfortable shoes; it's a walk. Photography is allowed.

A staff member confirmed that comedian Bill Engvall, famous for his "Here's your sign" routine, did indeed work at Inner Space Caverns many years ago when he was attending college. Engvall stated this in his 2007 autobiography, Just a Guy, but he provides no details of the experience.

[Matt J. McCullar, 02/09/2008]

Nearby Offbeat Places

Statue of Three-Legged WillieStatue of Three-Legged Willie, Georgetown, TX - 2 mi.
Doughnuts Larger Than Your HeadDoughnuts Larger Than Your Head, Round Rock, TX - 7 mi.
Ice Cream Cone BuildingIce Cream Cone Building, Pflugerville, TX - 11 mi.
In the region:
Willie Nelson. Janis Joplin Mural, Austin, TX - 24 mi.

Latest Tips Across Roadside America

Catch up on the latest discoveries from the road.

Explore Thousands of Oddball Tourist Attractions!

Unique destinations in the U.S. and Canada are our special obsession. Use our attraction recommendation and maps to plan your next road trip.

My Sights

My Sights on Roadside America

Create and Save Your Own Crazy Road Trip! ...Try My Sights

Mobile Apps

Roadside America app: iPhone, iPad Roadside America app for iPhone, iPad. On-route maps, 1,000s of photos, special research targets! ...More

Roadside Presidents app: iPhone, iPad Roadside Presidents app for iPhone, iPad. POTUS landmarks, oddities. ...More

Texas Latest Tips and Stories

Latest Visitor Tips

Sight of the Week

Sight of the Week

Biosphere 2, Oracle, Arizona (Aug 15-21, 2022)

SotW Archive

USA and Canada Tips and Stories

More Sightings