Part of Phong Nha cave in Phong Nha-Ke Bang National Park. |
The Park’s Science and International Cooperation Office said it is necessary to conduct an in-depth study to better understand values of newly-found caves for sustainable preservation and exploitation. Dubbed the “Kingdom of Caves”, Phong Nha-Ke Bang National Park was declared a World Natural Heritage by UNESCO twice in 2003 and 2015 thanks to its impressive scenery and archeological value. It is also home to Son Doong cave, which is recognised as the largest of its kind in the world.