Don't just wander around the surface of the earth — have a look at what's below it too. See curious natural formations and patterns in the deep, shadowy recesses of Tham Phu Kham.
This natural underground attraction is located in Vang Vieng, a destination that has lots going for it! Blue Lagoon, Pha Ngern Viewpoint, and Kaeng Nyui Waterfall are other popular sightseeing opportunities close by when you've had your fill of Tham Phu Kham.