About

Exploring the Inner Space Cavern in Highland Lakes, Texas, is a must-see if you want to know more about stalactites and stalagmites. With rotating guided walking tours, you’ll journey down beneath the earth's surface and experience the underbelly of Texas.

Great for families, young children, and adults alike, this cool adventure gives you an upside-down look at the funky things water, minerals, and time can make.

Not discovered until 1963, when a Texas Highway Department core drilling team accidentally stumbled upon them while conducting highway construction, this unique natural wonder attracts thousands of visitors each year.

Prior to their discovery, the existence of the Inner Space Caverns was unknown and had been hidden underground for millions of years. As soon as they were discovered, experts from the University of Texas at Austin were called in to explore the caverns and conduct research on its geological formations.

Formed over 10,000 years ago during the Pleistocene Epoch, the caverns were created by the erosion of limestone rock and acidic groundwater. Over time, this process led to the formation of various geological features such as stalactites, stalagmites, flowstones, and columns—hence the cool upside-down look!

According to archaeologists, the cave was used by prehistoric animals such as the extinct giant sloth and the saber-toothed tiger. In fact, scientists found evidence of their remains, indicating that the caverns were an important habitat for these early creatures.

And to honor this, the Inner Space Caverns commissioned an artist to paint these incredible creatures onto one of the walls.

In 1964, the Inner Space Caverns opened to the public for guided tours.

Since then, the caverns have become a popular tourist attraction and educational destination for visitors from all over the world. And over the years, many improvements and updates have been made to enhance the visitor experience.

If you’re wanting a cool check mark on your travel to-do list, then this is a great spot!

Interesting Facts About The Inner Space Caverns

Fun fact, Inner Space Caverns holds 72-degree year-round temperatures, making this the perfect place to go any time of the year! In fact, the beauty of Inner Space Caverns makes it a popular spot for photographers and filmmakers alike.

Several movies and tv shows have been filmed inside the caverns, including “The Alamo” (2004), “No Country For Old Men” (2007), “Texas Country Reporter” (2013), and “Mysteries at the Museum” (2014).

This amazing natural wonder has captivated visitors for centuries with its stunning rock formations, fascinating history, and unique activities.

This is a must-see destination for anyone looking to explore Texas' hidden gems!

Getting There

The drive from Austin to Inner Space Caverns is approximately 30 miles and takes 40-45 minutes, depending on traffic.

It's always a good idea to check traffic and weather conditions before setting out on your trip so that you can plan accordingly. Once you reach the caverns, follow the directional signs and staff instructions for an enjoyable experience.

Local Tips

The Inner Space Cavern is definitely a well-oiled machine and will keep you moving. Be prepared to walk FAST!
Wear appropriate clothing: The temperature inside the caverns is around 72 degrees Fahrenheit, so dress comfortably in layers. The ground can be damp and slippery, so wear comfortable closed-toe shoes with good traction.
Book your tickets in advance: The Inner Space Caverns are a popular destination for tourists, so it's advisable to book your ticket online in advance to avoid any disappointment.
Follow the park rules: To protect the natural formations inside the caverns, there are certain rules that visitors must follow. Do not touch or climb on the formations, stay on designated paths, and refrain from littering.
Take the guided tour: The Inner Space Caverns are only accessible through guided tours, which are led by knowledgeable guides who explain the history and geology of the cave. The tour takes about an hour and is a great opportunity to learn about the caverns while enjoying the beauty of the natural formations.

Staging environment