National Park Phong Nha - Ke Bang National Park has an area of 123,326ha, is where the primary forest on limestone mountains in Vietnam, where 1,007 species on the existing 2951 GMT, 198 them. Of these, 111 species in the Red Book of Vietnam in 2007, 119 species in the IUCN Red List, 39 species of Decree 32/2006 / ND-CP of the Government. Special populations Bach existence blue stone (calocedrus rupestris) 500 years old, an area of about 5000ha is considered the most unique forest habitat by global importance and conservation value.