Phong Nha-Kẻ Bàng National Park is located in central Vietnam and is known for its stunning limestone karst landscapes and extensive cave systems. Established as a national park in 2001, it covers over 885 square kilometers and is a UNESCO World Heritage Site, recognized for its unique biodiversity and geological features. The park is home to Phong Nha Cave and Son Doong Cave, the largest cave in the world. It supports a variety of ecosystems, including tropical forests and rivers, and is inhabited by numerous species, some of which are endangered. Visitors can explore its natural beauty through hiking, cave tours, and wildlife watching.