Son Doong was found by a local man in 1991.
Already existing for million years, it was only in 1991 when it was found by a local man in Vietnam. Son Doong is a Vietnamese word which means “Mountain River cave” since the cave also has a large, fast flowing underground river. The underground cave is poured with sunlight that pours through two huge entrances, allowing trees up to 50 meters tall to grow. It is currently the biggest cave in the world and located near the Vietnam-Laos border. The special thing about this cave is that, since it was discovered, only FEW people were able to navigate inside of it.
The Travel Monster 