The first 400 tourists have bought tours to visit the world's largest cave
25-11-2014
400 tourists from different countries have already bought tour to the largest cave in the world Hang Son Doong in Vietnam. Travel agency Oxalis started to sell tours to Hang Son Doong cave, which is located in the national park Phong Nha-Ke Bang. Travellers will make a 6-day trip throughout the cave, exploring the unique surfaces.