Below are photos of untouched beauty of Canh Cao Sinkhole. Canh Cao Sinkhole is 150m deep, formed by the collapse of a large cave ceiling. This sinkhole is hidden within the Non Nuoc Cao Bang Global ...

The Phong Nha-Ke Bang National Park, inscribed on the World Heritage List in 2003, covered 85,754 hectares. With this extension, the site covers a total surface area of 123,326 hectares (a 46 % ...