1000 Wonders of the World!
Hang Son Doong
CC BY-SA 2.0 | Author: Doug Knuth | Full Size | More Pics >

Hang Son Doong

Wonder Type: Natural
Country: Vietnam
Best of: Cave
Hang Son Doong Cave 'cave of the mountain river' has the largest known cave passage cross-section in the world, and is located near the Laos-Vietnam border. Inside is a large, fast-flowing subterranean river. It was formed in Carboniferous/Permian limestone. Hang Son Doong was found by a local man named Ho Khanh in 1991. The whistling sound of wind and roar of a rushing stream in the cave heard through the entrance as well as the steep descent prevented the local people from entering the cave. [More Details]
This article uses material from the Wikipedia article "Hang Son Doong", which is released under the Creative Commons Attribution-Share-Alike 3.0 License.