Le Bassac, a refubished teak rice barge today plies the waters of the Mekong on cruises from Saigon to Can Tho. The Mekong River is the world's 10th longest river running for over 4000 kilometers from the Tibetan Plateau through China's Yunnan province, Burma, Thailand, Laos, Cambodia and Vietnam. The Mekong basin is one of the richest areas of biodiversity in the world. More than 1200 species of fish have been identified. The difficulty of navigating the river has meant that it has divided rather than united the people who live near it.