Sơn Doong, the largest cave in the world, is ranked third on the list after the Inca Trail to Machu Picchu in Peru and the ‘Burning Man’ music and arts festival in Nevada, the US (Photo: Oxalis Adventures/Vietnam+)
“The incredible depths of the world’s largest cave lures in travellers who want a true adventure. But the arduous journey into this subterranean site makes booking a trek essential,” Lonely Planet wrote (Photo: Oxalis Adventures/Vietnam+)
“The major tour operator that takes travellers inside, Oxalis Adventure Tours, says on its website that less than 300 spaces remain for 2019 tours. If you want to make it happen book soon – or get on the waiting list for 2020,” Lonely Planet said (Photo: Oxalis Adventures/Vietnam+)
Son Doong Cave has been recognised as the largest of its kind in the world by three international record-keeping organisations – Guinness, the Association World, and WorldKings (Photo: Oxalis Adventures/Vietnam+)
The cave is located in the heart of Phong Nha-Ke Bang National Park in Quang Binh province (Photo: Oxalis Adventures/Vietnam+)
The cave was first explored in 2009 by the British Cave Research Association and has been open to the public since 2013 (Photo: Oxalis Adventures/Vietnam+)
The 1,645m-long cave system, which extends through a mountain, was named one of the most captivating caves on earth by National Geographic (Photo: Oxalis Adventures/Vietnam+)
The nine kilometre-long cave system, which extends through a mountain, was named one of the most captivating caves on earth by National Geographic (Photo: Oxalis Adventures/Vietnam+)
The cave contains some of the tallest known stalagmites in the world, which are up to 70m tall(Photo: Oxalis Adventures/Vietnam+)
VNA