Inner Space Cavern, just north of Austin, remains at a constant 72 degrees all year long, never floods, has paved trails that require no more gear than practical sneakers and has plenty of large, open ...

Discovered in 1963, the Inner Space Cavern offers a unique natural activity to explore and spelunk in a once-hidden cavern estimated to be over 20 million years old. It has beautiful formations, large ...

Located just off I-35 - Inner Space Cavern is only 5 miles away - Round Rock Premium Outlets is 2.2 miles.