New Delhi: Son Doong in Vietnam is the world's natural wonder and the largest cave.
It is about 9 km in length, 200 metres in width and 150 metres in height.
The cave was found in 1991 by a local resident Ho Khanh.
The cave has dethroned Malaysia's Deer Cave as the world's largest.
There is a beautiful picturesque scenery inside the cave due to water and limestone.
In 2009, a group of British cavers led by Howard Limbert explored the cave's interior, and then realized that it was possibly the greatest cave in the world after which the government declared it open for visitors.
