Mammoth Cave National Park is located in central Kentucky and is famous for having the longest cave system in the world. The park covers over 52,000 acres and features diverse ecosystems, including forests, rivers, and wildlife. Visitors can explore various cave tours that showcase stunning rock formations and underground rivers. Established in 1941, the park is a UNESCO World Heritage Site and is home to many unique species, including the endangered Kentucky cave shrimp. Outdoor activities such as hiking, camping, and birdwatching are also popular, making it a great destination for nature lovers.