Caspian Sea
The wide and endorheic Caspian Sea has a north–south orientation and its main freshwater inflow, the Volga River, enters at the shallow north end. Two deep basins occupy its central and southern areas. These facts lead to horizontal differences in temperature, salinity, and ecology. The Caspian Sea spreads out over nearly 750 miles (1,200 km) from north to south, with an average width of 200 miles (320 km). It covers a region of around 149,200 square miles (386,400 square km)—bigger than the region of Japan—and its surface is about 90 feet (27 meters) below sea level. The sea bed in the southern part reaches as low as 1,023 m (3,356 ft) below sea level, which is the second lowest natural depression on earth after Lake Baikal (−1,180 m, −3,871 ft). The ancient inhabitants of its coast perceived the Caspian Sea as an ocean, probably because of its saltiness and large size.
List of lakes
There are around hundreds of lakes, deep below the ice of Antarctica.
The Caspian Sea, located in western Asia on the eastern edges of Europe, is the largest lake on the planet. History records that it is called a sea because the Romans found it salty, especially in the southern reaches, and the name stuck. Oil and natural gas production platforms are replete along the edges of the sea. In addition, large quantities of sturgeon live in its waters, and the caviar produced from their eggs is a valuable commodity. Fresh water flows into the sea via the Volga River and Ural River in the north; however, the sea remains somewhat salty, central and south. The measured surface area is 371,000 sq km (143,244 sq mi), and he maximum depth is at 1025 m (3,363 ft). Additional details and map.