Inner Space Caverns - TTA

Hidden for over 10,000 years, Inner Space Cavern is one of the best-preserved caves in Texas. It was discovered by a Texas Highway Department core drilling team in the spring of 1963 and was opened to the public in the summer of 1966. Since that time, hundreds of thousands of visitors have seen this beautiful cave.

The amazing cave has beautiful formations, large rooms, prehistoric animal bones, and a truly unique discovery story. It remains a constant 72 degrees (but feels like 80 degrees with the humidity) year round and it does NOT flood during rains.

Hours

The last tour enters the cave 15 minutes before closing.
March 27, 2026 through May 22, 2026:
Monday through Friday 9-4, Saturday and Sunday 10-5

May 23, 2026 through September 7, 2026:
Open Daily 9 a.m. to 5 p.m. (summer hours) Closed
Easter Day
Thanksgiving, Nov. 28
Christmas Eve, Dec. 24
Christmas Day, Dec. 25
New Years Day, Jan. 1 – Open Noon