To explore Hang Son Doong from one entrace to the other it is necessary to cross several underground rivers. Depending on the season, the rains can push the water level up to the point of making some section inaccessible.

AsiaHang Sơn ĐoòngMountain River CavePhong NhaKe Bang National ParkSon Doong CaveSoutheast AsiaTravelVietnamVườn quốc gia Phong NhaKẻ Bàngcave