2. Lake Superior
The largest freshwater lake in the world is so big, it could hold all the water in the other Great Lakes — and three more Lake Eries. The surface area is roughly the size of the state of Maine. Ten percent of the world's fresh water that is not frozen is in Superior.
Henry Wadsworth Longfellow, coining a variation of an Indian name, called the lake "Gitche Gumee" (roughly "great sea" or "big water") in the "Song of Hiawatha." Canadian songwriter Gordon Lightfoot picked that up in "The Wreck of the Edmund Fitzgerald," about the loss of a freighter and its crew of 29 in a 1975 storm on the lake.