Phong Nha - Ke Bang is a national park and UNESCO World Heritage Site in the center of Quang Binh province in north-central Vietnam. It protects one of the world's two largest Karst regions with several hundred caves and grottoes Phong Nha - Ke Bang is a national park and UNESCO World Heritage Site in the center of Quang Binh province in north-central Vietnam. It protects one of the world's two largest Karst regions with several hundred caves and grottoes
The park covers a total area of 857.54 km² which are divided into three zones, a "strictly protected zone" (648.94 km²), an "ecological recovery zone" (174.49 km²), and an "administrative service zone" (34.11 km²).
Phong Nha-Ke Bang national park was first nominated as a UNESCO World Heritage Site in 1998. It was recognised as a world natural heritage site at the UNESCO's 27th general assembly session being held in Paris from June 30-July 5 2003. At the session, delegates from over 160 member countries of UNESCO World Heritage Convention agreed to include Phong Nha-Ke Bang park and 30 others worldwide to the list of world heritage sites