The Oxalis Company Limited, which was allowed by Quang Binh People's Committee to run the tour to En Cave and Son Doong, said it is selling the tour to Son Doong in 2017.
According to the central province of Quang Binh's regulation, every year there are 640 tourists to be discovered Son Doong cave. Depending on the weather, in 2017, Oxalis will be able to organize tours for
500-600 tourists with a cost of US$ 3,000 per tourist.
In 2016, 442 tourists visited & conquered Son Doong cave.
Son Doong cave is more than 200m wide, 150m high, and approximately 9km long. Within its caverns lie a jungle and a river, and the cave is large enough to fit a 40-storey skyscraper inside. The cave was classified as the largest cave in the world by the British Cave Research Association.