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Son Doong Cave

The largest natural cave in the world.

Son Doong Cave was first found in 1991 by Ho Khanh, a local man. In 2009, the cave was explored and published by a group of scientists from British Cave Research Association.

Son Dong Cave was formed 2-5 million years ago, when the river flowed through the limestone mountain area and was buried. The water eroded limestone and created an underground tunnel. In soft limestone areas, the collapse of tunnel ceiling formed large holes which became giant domes afterward.

The cave is about 200m high, 200m wide and at least 8.5km long. With these tremendous dimensions, Son Doong Cave is much larger than Deer Cave belonging to Gunung Mulu National Park in Malaysia (100m high, 90m wide, 2km long), and has replaced Deer Cave to take pole position as the world’s largest cave.

After the publication, Son Doong Cave quickly drew the attention of international mass media. The National Geographic Magazine (U.S) has published some articles admiring the beauty of the cave. The cave has also been voted by the BBC (U.K) as one of the most beautiful caves in the world.