Phong Nha – Ke Bang, the oldest major limestone karst ecosystem in Asia
Likened to a proud masterpiece of the creation of Quang Binh in particular and Vietnam in general, Phong Nha – Ke Bang is a system of more than 300 caves and long underground rivers created by layers of nameless limestone karst ranges from the Paleozoic (400 million years ago). This huge mysterious system surrounded by […]




















