The largest body of freshwater in the world is Lake Baikal, located in Siberia, Russia. This immense lake contains around 20% of the world's unfrozen surface freshwater, making it a significant natural resource. Lake Baikal is renowned not only for its size but also for its depth, reaching over 5,600 feet (1,700 meters), and it is the deepest lake in the world. The lake is home to a unique ecosystem with many endemic species, including the nerpa, the world's only freshwater seal. As a UNESCO World Heritage site, Lake Baikal is also celebrated for its stunning natural beauty.