Lake Bakal

The deepest and the oldest: Found in Siberia is the location of Lake Baikal, an ancient, massive lake in the mountainous Russian region of Siberia, north of the Mongolian border. It is 395 mi long and 49 mi wide, Lake Baikal has the largest surface area of any freshwater lake in Asia, at 12,248 sq mi), and is the deepest lake in the world at 1,642 meters (5,387 feet.

Lake Baikal also holds the distinction of being deepest and oldest lake in the world, being at least 25 million years old and counting. Apart from having the deepest maximum depth among all lakes in the world and harboring more than one-fifth of all the world's freshwater, Lake Baikal also holds the crown for the oldest lake in the world. lake located in the southern part of eastern Siberia within the republic of Buryatia and Irkutsk oblast (province) of Russia.