The Tanggula settlement, also known as Marquwo, Tuotuoheyan, or Togtogquwo, is located at above sea level in the central part of Tanggula Mountains, as the town's name indicates. The most famous local feature is the Geladaindong Peak (at elevation), near which the source of the Yangtze River is considered to be located. The area around the peak is protected as part of the Sanjiangyuan National Nature Reserve. The main settlement is located near the highway and railway crossing of the Tuotuo River, which is one of the headwaters of the Yangtze. This settlement is served by the Togtogquwo railway station. Other settlements in the same highway/railway corridor, further south, are Tongtian Heyan (Tongtian Riverside), Yanshiping, Wenquan, and Tanggula Bingzhan (Tanggula Military Post).