Published on : Sunday, January 19, 2014
According to the magazine, Son Doong Cave is now the largest natural cave in the world, created by a underground river under a limestone mountain range about 2-5 million years ago. The cave is 150 meters in width, over 200 in height and at least 5 km in length.
The 12 caves include Emerald in Thailand, Waitomo Glowworm in New Zealand, Crystal Caves of Naica in Mexico, Blue Grotto in Italy, Fingal in Scotland, and Lascaux in France.
Source:- Vietnam Tourism
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