Have you ever seen the mammoth billboard when you’re driving up I-35 in Georgetown and wondered what it’s all about? Or maybe heard about caves in the Austin area and wanted to check one out (without needing to be too adventurous)?
If you’re looking for something a little different to do with your kids or when you have family visiting (or you’re visiting Austin yourself), you should check out Inner Space Cavern in Georgetown! Adults, kids and teens can all enjoy it.
Here are all the answers to your questions about this cave system, so you’ll be ready for your visit!
In This Post
What is Inner Space Cavern?
Inner Space Cavern is a large cave under I-35 in Georgetown, north of Austin. It’s one of the best-preserved caves in Texas and is more than 10,000 years old. There are several large rooms and beautiful formations inside, as well as some cave drawings (modern ones!) and fossils.
Besides the cave, when you visit Inner Space Cavern, you can also ride the big “zip line” ride, pan for gems and stones, and play on the playground. And it has a surprisingly good gift shop.
Where is Inner Space Cavern?
You can find Inner Space Cavern north of Austin, on the south side of Georgetown, Texas. It’s just off I-35, so it’s easy to reach from Austin.
The address is 4200 S. I-35 Frontage Rd., Georgetown, TX 78626.
How long does it take to go through Inner Space Cavern?
The basic tour, called the Adventure Tour, takes about an hour to an hour and 15 minutes. It’s about a mile long on a paved trail (that can be steep and damp in places).
Tours leave every 20 to 30 minutes. Since tours are first come, first served, you may have to wait for the next available tour if you come during an especially busy time.
The Hidden Passages tour takes about an hour and a half. The Wild Cave tour (the advanced tour) takes 3.5 to 4 hours.
Do you have to take a tour to see Inner Space Cavern?
Yes, you can only enter the cavern on a guided tour. Reservations are not required for the Adventure Tour (the basic tour) or the Hidden Passages tour (must be aged 7+).
For the Wild Cave tour, you must make a reservation in advance. This is an advanced tour and much more physical than the basic tour. Guests must be 13 and older for this one.
What do you see on a tour?
When you’re on your Inner Space Cavern tour, you’ll get to see many different types of cave formations, with lots of silly names or comparison. Like a sumo wrestler eating ice cream, a bacon butterfly and a castle. You may even see some bats sleeping on the ceiling.
Your guide will take you through several big rooms and narrow hallways. At the end of the path (before you turn around to head back the way you came), there’s a room where the guide can turn off all the lights so you can experience total darkness.
You will also get to see places where fossils have been discovered, as well as (fake) cave paintings of prehistoric animals and some of the fossils on display.
How much does Inner Space Cavern cost?
The basic tour (Adventure Tour) costs $23.95 (adults) and $17.95 (child) on Mondays through Thursdays. Friday through Sunday, it’s $24.95 for adults and $18.95 for children. Ages 3 and under are free.
You can buy tickets at the cave.
What is the temperature in Inner Space Cavern?
The cave stays at about 72 degrees with 98% humidity so it feels like 80. You may feel cool when you first step inside, but after walking around, the humidity will likely make you feel warm.
How deep is Inner Space Cavern?
The lowest point in the cave is about 70 feet below ground.
Are there other caves near Austin?
If you want to check out other caverns in the area, you can drive to Burnet to Longhorn Cavern State Park, south to Natural Bridge Caverns in San Antonio, or try Wonder World Cave and Adventure Park in San Marcos.
Looking for other fun ideas for all ages? Try Museum of Ice Cream, Austin’s best museums, or mini-golf!