One of the most amazing cave in the world, Son Doong offers wonderful insight trip in Quang Binh province, Center Vietnam
Hang Son Doong, Quang Binh, Vietnam: With a height sufficient to accommodate a 40-storey building, Son Doong cave ‘s big enough for a Boeing 747 docking over. This cave is located in Phong Nha – Ke Bang National Pảk and is considered the world’s largest cave. It features its own biosphere, with clouds and trees in the sinkholes.