(vietnam tours operator) On the road to the grotto Son Doong, the British expedition was blocked by a towering limestone walls, an estimated 60 meters. Titus overhead, they see the light shine down, but not the other side know what the stone wall.
Exploration journey largest cave in the world - for many years and the great photos of the cave has launched the world. Later this month, Son Doong will again distinguish the Japanese company NHK scientific presentation of the first 3D movies of the cave to 60 countries.
Son Doong cave attract attention and amazement of the scientists inside the cave by the forests, the world's longest underground river, and so far the explorers did not know what is the end of the cave.
This cave is part of the...
