The spectacular sea caves of Apostle Islands
The Apostle Islands National Lakeshore is made up of 22 islands in Lake Superior, located off the coast of northern Wisconsin. The area boasts some of the most impressive sea caves in the Great Lakes region, and during warmer months, visitors can paddle along the sculpted shorelines and navigate through the caves' scenic passageways and arched chambers. But during the winter, witnessing the caves' icy transformation is much trickier. This year, however, the ice on Lake Superior is thick enough for people to reach the ice caves — for the first time since 2009, according to officials at the U.S. Department of the Interior.
Image credit: U.S. Department of the Interior