Which lake has the most water by volume?

Lake Baikal contains more water than any other lake by volume, with about 23,600 cubic kilometres. Its enormous depth and size make it by far the largest freshwater lake reservoir on the planet. Baikal’s water volume is a consequence of its tectonic origin and steep basin walls. Because it is so deep and old, it has developed an exceptionally distinctive ecosystem, including the Baikal seal. The lake is both a hydrological giant and a major natural archive of climate history.