Back in 1991 a local found the cave now known as Hang Son Doong cave, which means Mountain River Cave. This cave is very well hidden in the jungle and not easy to get to, it is located near the Laos-Vietnam border.
The local man heard a strange sound, which turned out to be the underground river system.
It wasn’t until 2009 that a team of British scientists form the British Cave Research Association, led by Howard and Deb Limbert, conducted a survey. What they found was astonishing. We now know it is the largest cave in the world.
A half-mile block of 40-story buildings could fit inside this lit stretch of Hang Son Doong, which may be the world’s biggest subterranean passage. Photo by Carsten Peter.
This photo is available as free wallpaper for your computer from National Geographic.
That light that you see, is actually coming from a helmet.
You have to see the magnificent photos of this cave, I promise you will be not believe the beauty of it all with the awesome river system, the colours are out of this world, in fact, it is like another world inside this cave. There is even a jungle inside the cave where a bit of the roof collapsed and the light it has generated has created another jungle.
View these pictures in National Geographic.
Read about the adventure from the cave explorers. National Geographic.
This is part 1, there are 3 videos in this series.