Dong Phong Nha Ke Bang Vietnam The forerunner of Phong Nha - Ke Bang National Park was the Phong Nha Natural Reserve formed in 1992. The Phong Nha Natural Reserve was one largest special use forest with an area of 41,123 ha. Then Phong Nha - Kẻ Bàng National Park was established under the Decision No 189/2001/QD-TTg dated December …