Hang Sơn Đoòng
Xuân Trạch, Bố Trạch District, Quang Binh Province, Vietnam
It is the largest known cave passage in the world by volume. The scale of this site’s interior is so massive it could fit an entire New York block inside, including skyscrapers, or have a Boeing 747 comfortably fly through without its wings being in any danger.
Location of Hang Sơn Đoòng