=> Phong Nha - Ke Bang National Park is a national park of Vietnam, located in Bo Trach and Minh Hoa districts, Quang Binh province. Phong Nha-Ke Bang is located in a karst area of ​​about 201,000 hectares in the territory of Vietnam. The core area of ​​the park is 85,754 ha and a buffer zone is 195,400 ha. This national park is set up to protect one of the two largest regions of the world with about 300 caves. The climate in this national park is characterized by a tropical climate, hot and humid. This national park is characteristic of limestone tectonics, rare underground rivers, flora and fauna in the Red Book of Vietnam and the World Red Book. The caves here have a total length of more than 80 km. The Phong Nha-Ke Bang area is one of the most distinct and beautiful examples of complex cotonic formations in Southeast Asia. It was recognized by UNESCO as a World Natural Heritage in accordance with geological and geomorphological criteria in 2003. It was recognized by UNESCO for the second time as a World Natural Heritage with biodiversity criteria in 2015.