Gallery - Deep sinkhole discovered in Phong Nha-Ke Bang National Park

Deep sinkhole discovered in Phong Nha-Ke Bang National ParkThe sinkhole has an oval-shaped opening measuring about 190 metres wide and 140 metres long. It widens towards the bottom, reaching about 250 metres in length and 200 metres in width, with a depth of around 120 metres.sinkhole, Phong Nha-Ke Bang National Park, Quang Tri,