Lake Vostok is the largest of Antarctica's almost 400 known subglacial lakes. Lake Vostok is located at the southern Pole of Cold, beneath Russia's Vostok Station under the surface of the central East Antarctic Ice Sheet, which is at 3,488 m (11,444 ft.) above mean sea level. The surface of this fresh water lake is approximately 4,000 m (13,100 ft.) under the surface of the ice, which places it at approximately 500 m (1,600 ft.) below sea level.
