Inner Space Cavern, Georgetown

Inner Space Cavern in Georgetown takes you down over Walk down over 70′ underground to see some amazing cave formations!


Know Before You Go

Wear comfortable shoes

Go to the restroom before your tour begins.


The entrance into Inner Space is a sloped walk down into the cavern, replacing the “elevator” that use to take passengers down.


Of course, there are lots of amazing cave formations inside the cavern, such as stalagmites, stalactites, colums, cave straws and cave bacon!  As with any cavern, the formations are all still growing, and can’t be touched because the oil on our hands will prevent any further growth!


Inner Space Caverns was discovered when I-35 was being built, and the tour actually runs under I-35!  During the tour, your guide will point out different locations that you can see once you surface!


Inner Space Caverns, like most of Central Texas, is formed by limestone, but there are streaks of chert, which appears very dull unless broken.  In Texas, Native Americans used chert to makes arrowheads!


Inner Space Caverns offers daily Adventure Tours, and smaller and more adventurous Hidden Passages Tours, which requires you use a flashlight to explore smaller passages in the caverns, as well as Wild Cave Tours, which takes you through undeveloped portions of the cave!


Many animal fossils and bones have been found in the caverns, including mastodons, sabre-toothed cats, sloths and much more!


Before or after your tour, the kids will enjoy “mining” for treasure in the Inner Space Mine.  No hard hat is required, instead you can purchase a bag filled with dirt, which they can sift through using the mine’s sluice to find the gems and minerals hidden inside!


Inner Space also has a small grill, serving hot dogs, nachos, etc.


There is a really nice gift shop, filled with lots of rocks, shirts and much more!

More To Do In Georgetown

Cool off on hot summer days at the Georgetown Blue Hole, a swimming hole near downtown Georgetown on the San Gabriel River!  For more information on this FREE park, click HERE.

Visit Downtown Georgetown, walk around the historic Williamson County Courthouse Square, or borrow a bicycle from the Georgetown Visitors Center to explore the town’s 9 miles of hike and bike trail along the San Gabriel River!

Cedar Breaks Park is one of the Army Corp of Engineers Parks on Lake Georgetown and offers camping, boat ramps and a sandy swim beach!  Click HERE for more information or to make a reservation.

Take a tour of the famous Gault Archaeological Site, a dig site of prehistoric people located in Williamson County.  Tours are held on 6 Saturday mornings a year.  For more information, click HERE.

Inner Space Cavern

3200 S. Hwy 35 Frontage Rd. Georgetown


Click HERE to visit their website

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