What is the largest freshwater lake by volume?

The largest freshwater lake by volume is Lake Baikal in Siberia, Russia. It contains approximately 23,600 cubic kilometres (5,700 cubic miles) of water, which is about 20% of the world’s unfrozen freshwater. Lake Baikal is also the deepest lake, reaching a depth of 1,642 metres (5,387 feet). It is home to unique wildlife, including the Baikal seal and numerous endemic fish species. A UNESCO World Heritage Site, it is a critical reservoir of biodiversity and a valuable natural resource.