The largest lake in the world by volume is the Baikal Lake, located in Siberia, Russia. It is known for holding about 20% of the world's unfrozen freshwater, which accounts for more natural pure water than any other lake. Its depth reaches around 1,642 meters (5,387 feet), making it also the world's deepest lake. Baikal is a UNESCO World Heritage Site, renowned for its unique biodiversity and stunning natural beauty.