High Quality Content by WIKIPEDIA articles! The Nam Song River is a small river in Laos that flows through the town of Vang Vieng. It is a popular tourist destination as many people enjoy seeing the Laotian countryside while going down the river in the inner tube of a tractor tyre or in a kayak. The river is surrounded by striking karst rock formations. Upstream from Vang Vieng, numerous bars have been built on the river`s banks to attract the tourists floating by.