In world geography, which lake is the deepest on Earth?

Lake Baikal is the deepest lake on Earth, reaching a maximum depth of about 1,642 metres.

The lake lies in southern Siberia, Russia, and formed in an active continental rift zone. It is also the world’s oldest existing freshwater lake, with an estimated age of roughly 25 million years.

Baikal contains about 20 percent of the world’s unfrozen surface freshwater, a remarkable share for a single lake. Its clear waters support many endemic species, including the Baikal seal, the only seal species found exclusively in a freshwater environment.

Lake Tanganyika is the second-deepest lake, while Lake Superior is the largest freshwater lake by surface area. These distinctions are different: deepest, oldest, largest by area, and greatest volume do not all identify the same lake.