Longhorn Cavern State Park is a popular tourist attraction located in the Texas Hill Country. The park is home to a large limestone cave system that was formed over millions of years through the process of erosion and water dissolution. Visitors can take a guided tour of the cave system, which features stunning formations such as stalactites, stalagmites, and flowstone.

In addition to the cave system, Longhorn Cavern State Park offers a range of outdoor activities, including hiking, camping, and picnicking. The park also has a visitor center, a gift shop, and a café.

Some of the specific points of interest within the cave system include the Crystal City room, the Indian Council Room, and the Hall of Diamonds. The park is also home to a number of unique species of wildlife, including the Mexican free-tailed bat and the golden-cheeked warbler.

Interesting facts about Longhorn Cavern State Park include the fact that the cave system was used as a speakeasy during the Prohibition era and as a fallout shelter during the Cold War. The park was also used as a filming location for a number of movies and TV shows, including the original "Tarzan" series.

The best time of year to visit Longhorn Cavern State Park is in the spring or fall, when the weather is mild and the crowds are smaller. However, the cave system is open year-round, and visitors can enjoy the park's outdoor activities in any season.