Located in Quang Binh Province, Vietnam, Son Doong is one of the world’s largest natural caves and has arguably the largest cave passage by volume. It was first discovered by a local in 1991 before it rose in world wide fame when a group of British cavers did a survey of the cave in 2009. Since then, tourist permits have been issued on a limited basis to preserve the natural and pristine state of the cave. There was some discussion on creating a cable car for tourist purposes, but due to pressure from environmentalists and locals, the plan was scrapped.
Not many people will be lucky enough to access such a wonder. Hence, I am very appreciative of National Geographic for creating an outstanding virtual tour of the cave, bringing it to everyone with Internet around the world. As a Vietnamese, I am very proud of my country and the gifts that Mother Nature gave us. I hope even if you may not afford a trip to Son Doong nor secure a permit, you can still learn a bit about my country or feel more motivated to visit us and see what else we have to offer. I assure you that we have plenty to satisfy your curiosity.