The Nam Song is a small river in Laos that flows through the city of Vang Vieng. It is a popular tourist destination because many people enjoy seeing the Lao landscape as they drive down the river in the haul of a tractor tire or a kayak. The river is surrounded by distinctive karst rock formations. Upstream from Vang Vieng, numerous bars were built on the banks of the river to lure the passing tourists. In 2012, the tubing was banned by the government. Today you can still drive with a hoop across the river, but instead cozy, without bars, drunks, and party.
The Nam Song River is connected to the Nam Ngum Reservoir by the Nam Song Dam.