Head north of Austin on I-35 and you can’t miss it: Inner Space Cavern. It’s a place that’s full of history, adventure and fun. Take part in the traditional cave tours, or opt for the wild cave tours. There is something for everyone and you might even find yourself climbing through narrow passages head first! Inner Space can entertain people of all ages! If the tour doesn’t interest you, there is also a playground, a mining area, a gift shop, and several displays of fossils that were found right here in the cave. Hidden for over 10,000 years, Inner Space Cavern is one of the best preserved caves in Texas.