Baikal Lake, Siberia, Russia

Lake Baikal is the world's oldest lake at 25 million years and deepest averaging 1642 m (5387 ft)


Baikal is home to more than 1,700 species of plants and animals, two thirds of which can be found nowhere else in the world and was declared a UNESCO World Heritage Site in 1996.


Lake Baikal is nicknamed "Older sister of Sister Lakes".