According to the National Oceanic and Atmospheric Administration (NOAA) Great Lakes Environmental Research Laboratory, about 94% of Lake Superior, the world largest fresh water lake, is covered with ice, enabling thousands of people to visit the islands on foot for the first time since 2009. Itís quite the spectacle. Man looks at ice formations in sea cave of the Apostle Islands National Lakeshore of Lake Superior. Car travels the ice road on Lake Superior between Bayfield, Wisconsin and Madeline Island. A woman photographs ice formations on a rock face of the Apostle Islands National Lakeshore.