The largest body of freshwater on Earth is Lake Baikal, located in Siberia, Russia. It contains about 20% of the world's unfrozen surface freshwater, making it an incredibly important ecological and hydrological resource. Lake Baikal is also remarkable for its depth, reaching over 1,600 meters (5,200 feet), making it the world's deepest lake. Its unique biodiversity includes species found nowhere else, such as the Baikal seal. The lake is not only significant for its ecological value but also for cultural and economic reasons, drawing researchers and ecotourists interested in its unique properties and natural beauty.