There are many things that make the Son Doong Cave in Vietnam a remarkable natural wonder; at about 9km in length, 200m in width and 150m in height, it is the largest cave in the world, with caverns capable of fitting entire city streets and skyscrapers. It is home to a river, jungles, and entire cave ecosystems. Only slightly less remarkable is the fact that, until 2009, we did not even know how grandiose and impressive Son Doong (or Mountain River) Cave really is.
The cave was found in 1991 by local man Ho Khanh. In 2009, a group of British cavers led by Howard Limbert explored the cave’s interior, only then realizing that it was possibly the greatest cave in the world. Son Doong Cave has dethroned Malaysia’s Deer Cave as the world’s largest