Apostle Islands National Lakeshore

From the U.S. Department of the Interior:

Over thousands of years, Lake Superior carved out caves in the sandstone cliffs of the #Wisconsinlakeshore. Today, when conditions are right, you can hike or paddle out and see these remarkable formations clad in snow and ice at Apostle Islands National Lakeshore. For current information, go tohttp://www.nps.gov/apis/mainland-caves-winter.htm. Photo of “The Keyhole” by Michael DeWitt (www.sharetheexperience.org). — at Apostle Islands National Lakeshore.