Province d'An Giang, That Son mountain

An Giang occupies a position in the upper reaches of the Mekong Delta. The Hau Giang and Tien Giang branches of the Mekong are the dominant geographical features of the province. With the exception of the west, most of An Giang is fairly flat, and is criss-crossed by many canals and small rivers. That Son mountain (Thất Sơn range) or the 'Seven Mountains', are located in the western Tịnh Biên District.