The world's largest lake is so vast that it's four times larger than its closest competitor and is often dubbed as a fully-fledged sea.

Lake Baikal, known as the Blue Eye of Siberia or the Pearl of Asia, is the oldest and deepest lake in the world.

Environmental activists are alarmed over the rapidly declining water levels of the Caspian Sea, highlighting the urgent need for action. The falling water levels pose significant threats to the ...