The low hills of the Mesabi and Vermilion Ranges, both rich in iron ore deposits, are discernible in the center and right center of this south-looking, low-oblique photograph. The ores in the Mesabi, found in a belt 110 miles (175 kilometers) long and from 1 to 3 miles (1 to 5 kilometers) wide between Grand Rapids and Babbitt, lie in horizontal layers near the surface and are mined by the open-pit method. In Superior National Forest north of the Mesabi Range, numerous ice-covered lakes appear, the largest of which is Vermilion Lake [35 miles (56 kilometers) long]. Also discernible are blue Lake Superior and the Northern Highlands of northwest Wisconsin (upper left).