In 1991, a Vietnamese farmer discovered an underground cave that turned out to be a portal to a whole new world. The cave is known as Hang Son Doong, the largest cave in the world.
Ho Khanh was out hunting when he stumbled across an opening in a limestone cliff, he could hear the sounds of a river raging inside but didn’t inspect it any further. At the same time, two members of the British Cave Research Association (BCRA), Howard and Deb Limbert, were staying in Phong Nha and conducting exploratory cave expeditions in the area. They spoke to Ho Khanh who mentioned that he found a cave with clouds and a river inside. Howard and Deb urged Ho Khanh to try and rediscover the cave but to no avail. In 2008 while out on another hunting mission, Ho Khanh found the mysterious entrance to the cave once more and this time he took note of the path. In 2009, Khanh led Howard and Deb back to the cave to enter what would later become known as Hang Son Doong or ‘Mountain River Cave’
Hang Son Doong is over 5km long, with sections reaching up to 200m tall and 150m wide. It is so big that it has its own river, jungle and climate. According to scientists it can house a 40-floor tall building in New York, stack about 25 double decker buses or even store a 68 Boeing 777 aircraft. Son Doong is now one of the hottest tourist destinations in Vietnam, the cave is an adventurous paradise for those who would like to benefit from a thrilling experience in the heart of nature. Of course, adventurers on Earth all wish to check in and come face-to-face with the largest cave of the world at least once in a lifetime. Before booking a tour, you should remember that a discovery of Son Doong is not a relaxing or sightseeing journey. Instead, it can challenge your spirit, due to the difficult and dangerous geography. You will need safety harnesses, ropes, lights and helmets to enter the cave, though the trek might put you through your paces, it certainly looks like its worth it.