Quang Binh tourism organizes an online knowledge contest about Son Doong Cave
Located in Quang Binh Province in Central Vietnam, Son Doong Cave is considered to be the heart of the Phong Nha – Ke Bang National Park. The Cave was recognized as a UNESCO World Heritage in 2003. For those who love exploring and adventuring, the cave is definitely one of the destinations that cannot be missed in Vietnam. As a part of interesting activities in order to celebrate the 15th…