Phong Nha-Kẻ Bàng National Park
Bố Trạch District, Quang Binh Province, Vietnam
Phong Nha-Ke Bang National Park contains the oldest karst mountains in Asia, formed approximately 400 million years ago. Riddled with hundreds of cave systems – many of extraordinary scale and length – and spectacular underground rivers. It is designated as a Unesco World Heritage Site in 2003.
Location of Phong Nha-Kẻ Bàng National Park