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U.S. Department of the Interior sent this bulletin at 08/03/2016 03:02 PM EDT

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Are you struggling in the summer heat? Let’s flashback to...
08/03/2016 10:22 AM EDT



Are you struggling in the summer heat? Let’s flashback to December and take a mental stroll through the ice caves at Apostle Islands National Lakeshore in Wisconsin. Accessible by foot when Lake Superior freezes over - which doesn’t happen every year - the caves are like a palace decorated with hanging blue ice formations. It’s a very cool experience. Photo by Wan Shi (www.sharetheexperience.org).