Time Required : 2 hours (day tour)
4-5 days (full tour)
Entry Fee : Guided tour (group) - USD 3000 per person (includes national park fee)
Officially the largest natural cave in the world, Son Doong Cave was the last discovered cave in 2009. With its ceiling reaching up to heights of 200 metres, the beautiful imperfections of stalactites and stalagmites are sheerly congruent to fanciful imaginations. The length of the cave is 5 km but it is not completely accessible because of the fast-flowing underground river.