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Inner Space Cavern is located in Georgetown, Texas, and was discovered during the construction of Interstate 35 by the Texas Highway Department in 1963.
According to the prehistoric animal remains that were discovered in the cave, there were several openings through which animals entered and became trapped in the mud.
While several miles of cave tunnels have been explored, many sections remain unknown due to blocked passages. The cave was opened to the general public in 1966.
Today, there are three different tours, from a basic guided tour to the challenging guided spelunking tour. The tours run through more than 1.2 miles of passage, but non-public passages are closed and well-guarded.
4200 I-35, Georgetown, TX 78626
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