Inner Space Cavern
4200 N Interstate 35 Frontage Rd, Georgetown, TX 78626, USA
Sun 11am - 5pm
Mon - Fri 9am - 4pm
Sat 10am - 5pm
A Fortuitous FindFirst discovered in 1963, Inner Space Cavern is a karst cave—if you’re not up on your geological terms that means it was formed through the process of water dissolving soluble rocks like limestone. When Texas Highway Department construction workers were testing the area during the construction of Interstate 35, a drill dropped nearly 30 feet through one of the test holes, and an entirely new underground world was discovered. One of the best preserved caverns in the state, Inner Space Cavern has a thick soda straw ceiling with hundreds of thin stalactites. The Wild Cave tour takes visitors off of the marked trails, but must be reserved in advance.