The Indus River at its confluence with the Zanskar River in India. The river is a growing source of discord between India and Pakistan, made worse by the ongoing dispute over Kashmir.
The idea to dam the Yangtze river originated more than 70 years ago, but it wasn't until 1992 that the Chinese government approved the project. The dam generated controversy, partly because over 1 million people had to be relocated.
Estimates vary widely on its cost, but it's thought the Three Gorges Dam is the most expensive hydroelectric project ever built.
Elsewhere in China, visitors gather to watch giant gushes of water being released from the Xiaolangdi dam to clear up the sediment-laden Yellow river and to prevent localized flooding, in Jiyuan, central China's Henan province.