Qiandao Lake in China’s eastern province of Zhejiang, also known as Thousand Island Lake, was created in 1959 following the construction of the Xin'an River hydroelectric station and dam. It flooded the area, controversially forcing 290,000 people to relocate their homes and submerging two ancient cities. Island-hopping boat tours are usually popular with visitors and it’s possible to scuba dive to see the water-logged ruins.

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