Exploring The Inner Space Cavern

Believe it or not, the cave system was actually discovered by accident during the Spring of 1963. The Texas Highway Department was drilling the nearby ground to see if it was stable for a potential large highway overpass. During this test, the drill bit suddenly dropped over 26 feet, alerting the crew that there just might be something other than rocks beneath them.

This led to the discovery of the immense cave system, where they quickly spent the next few months studying the area. Years later, in 1966, the cave system was opened to the public, who have cherished it ever since. Today it can be explored in its warm 72 degree interior, offering a cozy, yet thrilling experience to all who participate.

The Inner Space Cavern is a wondrous limestone cave, shaped over centuries by the slow, steady drip of acidic water through rock. The result? Fascinating formations like:

Stalactites: An icicle-shaped formation that hangs from the ceiling. Most stalactites have pointed tips, and often have water dripping from them.
Stalagmites: This upward-growing mound is created from the dripping water off the stalactite tips. The stalagmites differ in that they have rounded or flattened tips, versus the pointed tips of the stalactites.
Columns: Sometimes stalagmites and stalactites meet in the middle, forming what is referred to as a column. These can be seen throughout the caves.
Flowstones and soda straws: These mesmerizing structures hang from the ceiling or along the walls of the caves, and are stalactites in different shapes and sizes. Flowstones appear as a wave of calcite, whereas soda straws appear as sharp and skinny tube-like stalactites.

Depending on your desired experience, the cavern offers a variety of guided tours:

Adventure Tour: Seen as the “classic” tour, this experience is perfect for groups of all ages. You’ll be led along a paved and lit path, seeing all the spectacular formations. It departs every 20 to 30 minutes on a first come, first-served basis, with no need to make reservations.
Hidden Passages Tour: Explore delicate formations in a new, undeveloped trail with this tour. It is not recommended for guests with physical limitations or claustrophobia, so plan accordingly.
Wild Cave Tour: Are you a thrill seeker? If so, this tour is for you. Hike, crawl, climb, and squeeze your way through the formations. This tour is physically demanding and will push you to your limits, but requires no experience to participate.
Ice Age Tour: Learn more about the animals preserved in the Inner Space Cavern as you venture in on this exciting expedition. Tag along with a real paleontologist and learn about ice age animals during your exciting venture.

Conveniently located right off of Interstate 35 near Georgetown, TX, here’s why you’ll love visiting:

Family-Fun: With tours developed for all levels of skill and interest, it is the perfect day out with your family and friends.
Educational Value: You’ll love learning more about geology, paleontology, and the local history in an unforgettable hands-on way.
Immaculate Scenery: Soak it all in as you explore the caves, with their incomparable natural beauty. Make sure to bring your cameras, so you can capture the special moments.

Exploring The Inner Space Cavern:

A Hidden Gem

An Accidental Discovery

A Geological Wonderland

Choose Your Adventure

Planning Your Visit

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