Located in the heart of the UNESCO-listed Phong Nha-Ke Bang National Park in Vietnam's Quang Binh province, Hang Son Doong is one of the most captivating adventures that can be experienced in Southeast Asia.
Hang Son Doong
Stretching more than five kilometers long and reaching heights of 200 meters, the main cavern of Hang Son Doong is large enough to house an entire New York City block.
The eco-system inside Hang Son Doong is as unique as it is large, and it even has its own localized weather system.
Once inside hikers are expected to abseil, climb, crawl and swim through underground rivers to arrive at the end of the cave. It's an adventure like no other.