River systems of Thailand divides into two major branches, the " Tiền Giang" (Front River) and "Hậu Giang" (Back River). These in turn enter the South China Sea through nine estuaries. The following are the principal tributaries of Mekong River which flow through Thailand (tributaries entirely outside the Thai border not shown). The Mekong drains a considerable portion of northeast Thailand. In terms of Thai territory drained, it is second only to the Chao Phraya system. The Salawin River rises in Tibet (Tibetan: རྒྱལ་མོ་རྔུལ་ཆུ།) after which it flows through Yunnan, where it is known as the "Nujiang" River (), although either name can be
Burma Railway at Hellfire Pass. Two other museums are in Kanchanaburi: the Thailand–Burma Railway Centre, opened in March 2003, and the JEATH War Museum. There is a memorial plaque at the Kwai bridge itself and an historic wartime steam locomotive is on display. A preserved section of line has been rebuilt at the National Memorial Arboretum in England. The construction of the railway has been the subject of a novel and an award-winning film, "The Bridge on the River Kwai" (itself an adaptation of the French language novel "The Bridge over the River Kwai"); a novel, "The Narrow Road to the Deep