biggest sweet water lakes in world
World's Largest Lake (by volume): Lake Baikal is the world's largest freshwater lake in terms of volume. It contains about 5,521 cubic miles of water (23,013 cubic kilometers), or approximately 20% of Earth's fresh surface water. This is a volume of water approximately equivalent to all five of the North American Great Lakes combined.
--The Great Lakes include the largest freshwater lake in the world by surface area (Lake Superior), and the longest stretch of freshwater dunes on Earth (Lake Michigan). --The world's largest concentration of lighthouses is in the Great Lakes (more than 200 on the United States coastline).