Son Doong, Vietnam
From series “Largest and Most Branched Caves on Earth”
In Vietnam, located on the territory of the national Phong-Nha-kevo Park is one of the largest caves in the world - Son Doong. The cave was accidentally discovered in 1991 by the locals Ho-Hang. When he looked into the underground vault, he heard the strong whistle and hastily left this uncertain place. The wind whistling out of the cave has deterred the locals and the researchers for a long time. In 2009 the British speleologists decided to research the cave. It has been found that the whistling sounds come from the stormy Rao Tuong river.
The length of the largest hall of the cave, which is currently explored, forms 5 km. The height of this hall is also quite impressive and reaches 200 meters in some places. The average width is 150 meters. This room has enough room for a modern 40-storey skyscraper. One can literally translate the name of the Rao Tuong river as the «cave of the mountain river». The river flowing through the underground vault is the main point of the cave.
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Son Doong - interactive map
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