The biggest lake on the planet (+photos)

The Caspian Sea is undoubtedly the biggest lake by area on the planet. It can also be classified as the biggest full-sized sea. It covers a territory of 143,23 thousand square miles. The Lake has no natural outflows. Geographically, the lake borders with five countries: Kazakhstan, Russia, Iran, Azerbaijan, and Turkmenistan.

The maximum length the Caspian Sea is 640 miles. The supreme width is 270 miles. Marine scientists state that the average depth of the lake is 692 feet. The maximum depth is 3,358 feet.

Did you know that the antique populations of lakes coasts supposed the Caspian Sea as a huge ocean because its water contains much salt and there are no borders to be seen? Yeah, historians have already found much evidence of this theory. The word Caspian originated from the title of “the Caspi” – earliest people who existed in Transcaucasia. And in the period of classical antiquity Greeks called the lake Hyrcanian Ocean. The Caspian Lake, as well as the Black and the Aral Seas, is a relic of the antique Paratethys Sea.


There is also one arguable point about the Caspian Sea – its status. There are several key concerns affected by the Caspian Sea position: admission to natural gas and oil, admission for fishing, and access to intercontinental waters. For example, admission to the Volga River is predominantly significant for the non-coastal districts of Kazakhstan, Azerbaijan, and Turkmenistan. This problem is certainly very delicate to Russian Federation, as this prospective traffic flow will move over its territory.


An intensive oil production in recent years has resulted in hazardous environmental contamination of the Lake. For example, Azerbaijan has been affected by huge environmental damage because of the petrochemical manufacturing. Thus, the species of marine birds in the area have been expressively reduced in the past years.

Learn more about the largest lakes on earth