Son Doong Cave
We continue our journey from Yemen and we arrive in Vietnam where the largest cave in the world is located.
As of 2009 the Son Doong Cave is also the largest known cave passage cross-section in the world.
A popular thing among tourist attractions, the Son Doong Cave was found by H? Khanh in 1991.
In August 2003, at the price of $3000 for a guided tour the first tourist group explored the cave and it was amazing.
For the season of 2015 only 500 permits were issued for exploring the incredible Vietnamese cave.
