Isn't this cool? I recently traveled to Minnesota's North Shore, which runs along the north side of Lake Superior. If you've never done it, you should drive up Highway 61 from Duluth and enjoy the coastline of Lake Superior. Lake Superior accounts for 10 percent of the world's fresh water supply. If you took the water from Superior, you could flood all of north America, including the U.S., Canada and Mexico, with an inch of water.