National Geographic - The world's biggest cave 2010 HDTV 720p
Upload :Haikaka National Geographic
Hang Son Doong - Son Trach commune in Bo Trach district, Quang Binh province - is the largest natural caves in the world. This cave is located in the caves of Phong Nha-Ke Bang. Hang is part of the underground system connected to more than 150 different activities in Vietnam, located near the border with Laos
Limestone mountains Vietnam-Laos border region has many caves, such as the Phong Nha has been known for a long but Son Doong cave has been discovered only in 1991 when Ho Khanh, a local people stumbled out into the isolated store to avoid the rain. By some time in 2006 when the expedition Association Royal cave to this area, the Ho Khanh new poll to tell them. (more)
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