Great wall, Vietnam

Son Doong is one of Vietnam's largest caves. The towering wall of 100 meters high is deep in Son Doong cave.






The Great Wall is a stalagmite wall near the end of Son Doong cave, which is the world's largest cave in the Central province of Quang Binh




Tourists want to conquer this wall, they have to have special equipment along with instruction of experts.




Beyong the wall is another 600 meters of the cave and the exit.

Photos of Thanh Nien online