Thailand: Pak Mun port on the Mun River, a tributary of the Mekong, as seen by French expeditioner Louis Delaporte in 1867.

The River Mekong is the world's 12th-longest river. From its Himalayan source on the Tibetan plateau, it flows some 4,350 km (2,703 miles) through China's Yunnan province, Burma, Laos, Thailand, Cambodia and Vietnam, finally draining in the South China Sea. The recent construction of hydroelectric dams on the river and its tributaries has reduced the water flow dramatically during the dry season in Southeast Asia. In this 1867 drawing by French expeditioner Louis Delaporte, the Mun River is estimated by the artist at 18 m in height and 120 to 150 m wide. Nowadays, the controversial Pak Mun Dam stands close to this very point.

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Pictures From History