The largest freshwater lake by volume is Lake Baikal, located in Siberia, Russia. It holds about 20% of the world's unfrozen freshwater, making it not only significant in size but also a crucial ecological resource. Lake Baikal is renowned for its depth, reaching over 1,600 meters (5,248 feet), and its unique biodiversity, including species such as the Baikal seal. The lake is also recognized for its stunning natural beauty and is a UNESCO World Heritage Site. Its ancient formation and unique geological features make it a vital area for research and conservation.