British and Vietnamese speleologists have found 25 more caves and grottos with a total length of 12 km in the buffer zone of the Phong Nha-Ke Bang natural heritage site in central Quang Binh...
A new stone cave has been discovered on Lom Bo Island, Ha Long Bay, 15km south of the mainland. The cave lies in a cliff about 25m above the water surface. The two entrances to the cave are very...