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U.S. Department of the Interior sent this bulletin at 12/29/2015 11:01 AM ESTHaving trouble viewing this email? View it as a Web page.
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12/29/2015 10:20 AM EST
Over thousands of years, Lake Superior carved out caves in the sandstone cliffs of the Wisconsin lakeshore. Today, when conditions are right, you can hike out and see these remarkable formations clad in snow and ice at Apostle Islands National Lakeshore. For current information, go to http://www.nps.gov/apis/mainland-caves-winter.htm. Photo of “The Keyhole” by Michael DeWitt (www.sharetheexperience.org).
