The Great Lakes — Erie, Huron, Michigan, Ontario, and Superior — hold one-fifth of all the fresh water on Earth’s surface. Their combined coastline extends for over 10,000 miles. Each year, they attract several million tourists from the U.S. and around the world. But those are pretty basic facts. While you might know the names and locations of the Great Lakes, you might not know these 17 fascinating tidbits about the largest freshwater system in the world.
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