Worlds deepest freshwater lake

Lake Baikal in Siberia, Russia, is the world's deepest fresh water lake at 1,638 metres deep. It is 636 km long and is the world's sixth largest lake and 1,181 metres of it is below sea level. It contains 20% of the world's fresh water which is so clear that divers suffer from vertigo. Based on sediment at the bottom is also the world's oldest lake at 25 million years, based on an ancient fault, the Olkhon Crevice.