So large that it is often mistaken for a sea, Russia's Lake Baikal is the deepest and oldest lake in the world, and the largest freshwater lake by volume. Famous for its crystal clear waters and unique wildlife, the lake is under threat by pollution, poaching and development.
Located in south-central Siberia, not far from the Mongolian border and surrounded by mountains, forests and wild rivers, Baikal is an immense and breathtaking area of natural beauty.
Although it's not the biggest lake in the world in size - that distinction goes to the salty Caspian Sea - it is the largest by volume.