Bordering Cambodia, An Giang province is best-known for being home to pastel-painted Chau Doc, the closest large town to the Vietnamese/Cambodian border crossing on the Mekong River. Wedged between the Cambodian frontier, Kieng Giang and Can Tho provinces to the south and Dong Thap province to the north, An Giang is a particularly riverine province, with both the Bassac and Mekong Rivers within its boundaries.
The nondescript provincial capital Long Xuyen lies around 50km southeast of the border with Cambodia. Some travellers may find it convenient to pass through here for its transportation connections but there are otherwise few other reasons to stay in the capital.
(http://www.travelfish.org/location/vietnam/mekong_delta/an_giang/chau_doc)