The mainland ice caves of the Apostle Islands National Lakeshore near Bayfield, Wisconsin, have opened to foot traffic for the first time since 2009 - thanks to a cold winter that made for thick ice along the shore of Lake Superior. For a story I wrote for the St. Paul Pioneer Press on the ice caves, visit www.twincities.com/travel/ci_25028967/winter-access-drama... Copyright: Andy Rathbun