The bright green lake in the lower part of this image is Lake Urmia, in Iran. The edges of the lake appear white as they are framed by salt flats. The southern part of the lake is shallower and thus appears lighter in color and shows more salt flats.
In the upper part of the image, on the contrary, is Lake Sevan, the largest lake in Armenia and the Caucasus region. It is one of the largest high-altitude lakes in the world. The lake appears dark blue in color, as it is significantly deeper than its southern neighbor. Lake Sevan is situated in the central part of the Republic of Armenia, inside the Gegharkunik Province, at the altitude of 1,900m above sea level. The total surface area of its basin is about 5,000 km2, the lake itself is 940 km2, and the volume is 34.0 bln cubic meters.
Lake Urmia (farsi: دریاچه ارومیه, Daryâcheh-ye Orumiyeh (or Oroumieh), Azerbaijani turkish: اورمو گؤلو, Urmu Gölü, Urmiye Gölü is a salt lake in northwestern Iran, near Iran's border with Turkey. The lake is between the Iranian provinces of East Azerbaijan and West Azerbaijan, west of the southern portion of the similarly shaped Caspian Sea. It is the largest lake in the Middle East, and the third largest salt water lake on earth, with a surface area of approximately 5,200 km² (2,000 mile²), 140 km (87 mi) length, 55 km (34 mi) width, and 16 m (52 ft) depth. Lake Urmia is protected as a "National Park" by the Iranian Department of Environment.
Lake Urmia has 102 islands. The second largest island, Shahi Island, is the burial place of Hulagu Khan, the grandson of Genghis Khan and the sacker of Baghdad.
Source of picture