Sightseers look at icicles at the mouth of a sea cave of the Apostle Islands National Lakeshore of Lake Superior near Cornucopia, Wisconsin February 14, 2014. According to the National Oceanic and ... more 
Sightseers look at icicles at the mouth of a sea cave of the Apostle Islands National Lakeshore of Lake Superior near Cornucopia, Wisconsin February 14, 2014. According to the National Oceanic and Atmospheric Administration (NOAA) Great Lakes Environmental Research Laboratory, about 94% of Lake Superior is covered with ice, enabling thousands of people to visit the islands on foot for the first time since 2009. The Great Lakes, which contain one fifth of the world's surface fresh water, are 88% covered with ice. Picture taken February 14, 2014. REUTERS/Eric Miller (UNITED STATES - Tags: ENVIRONMENT TRAVEL TPX IMAGES OF THE DAY) less 
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Reuters | Photo By ERIC MILLER / REUTERS
Sun, Feb 16, 2014 3:03 PM EST