By Destination Unlimited on in Travel
Deep in the jungle in some of the oldest Limestone mountains in Asia, you'll find Hang Sơn Đoòng (translated to Mountain River Cave), the World's largest cave. Discovered by a local in 1991 and explored in 2006 by scientists, it has only been open to the public since 2013. A jungle forms in the sunlight a quarter mile beneath the ground level.
