Visit the National Cave of Texas. Located less than 90 minutes from Austin, Texas, Longhorn Cavern State Park is a unique Hill Country destination full of natural beauty and Texas-sized tales. Developed in the 1930s by the Civilian Conservation Corps (CCC), the park’s star attraction is Longhorn Cavern, an underground wonder created by the dissolving and cutting action of an ancient river. Enjoy a guided cave tour, hike a Hill Country trail, and admire some of Texas' best examples of historic CCC architecture. It's all part of the story of Longhorn Cavern State Park.