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Russia

Nicknamed "Dragon Lake," this body of water is formed by the Bratskove Reservoir, built along the Angara River in southern Siberia, near the city of Bratsk. At its inauguration in 1967, the Reservoir was the largest artificial lake in the world with a surface area of 5,470 sq km (2,110 sq mi). This high-resolution satellite image was acquired in winter, when the lake was frozen. Image courtesy of USGS.