About 400m south of Tham Hoi, along a well-used path, is the highlight of this trip, Tham Nam . The cave is about 500m long and a tributary of the Nam Song flows out of its low entrance. In the dry season you can wade into the cave, but when the water is higher you need to take a tube from the friendly woman near the entrance; the tube and headlamp are included in the entrance fee. Dragging yourself through the tunnel on the fixed rope is fun.
