The fortress of Gonggar Dzong (gong dkar rdzong) is near the confluence of the Tsangpo and Kyichu Rivers.
South Lato comprises the upper reaches of Matsang Tsangpo, Bum-chu, and Kyirong Tsangpo.
The Chinese reached here through this historic Bailey trail (named after the legendary Lt. Colonel Frederick Marshman Bailey who made a tough exploration to the Tsangpo Gorges with Captain Henry Morshead of the Survey of India in 1911-12 and descended down to Thembang while returning back to British India).
Yarlung Valley, formed by the Yarlung River and refers especially to the district where it joins with the Chongye River, and broadens out into a large plain about 2 km wide, before they flow north into the Yarlung Tsangpo River or Brahmaputra