The 112-kilometer-long river originates in Longshan County. In the lower reaches, it joins You River, and goes into Yuan River. It was named Mengdong River after the hole in its sources in Mengbi Vally in Longshan County. Nowadays, the Mengdong River scenic spot is famous largely as an ideal place for rafting. Here visitors can raft on it in rubber boats, and because of the fantastic scenery and unforgettable experience, it gains the praise as the "number one rafting in the world". Mengdong River is one of the sources of the culture of Tujia nationality. One can know more about the history, culture and customs of Tujia nationality by visiting the Old Town of Wang Valley, Tujia History Museum, Tujia Custom Museum. At the same time, one can take part in various cultural activities.