The Great Lakes

Lake Michigan is one of the five Great Lakes of North America and the only one located entirely within the United States. The other four Great Lakes are shared by the U.S. and Canada. Lake Michigan is the second-largest of the Great Lakes by volume and the third-largest by surface area, after Lake Superior and Lake Huron. The Great Lakes form the largest group of freshwater lakes on Earth, containing 21% of the world's surface fresh water by volume.