Lake Superior's dazzling ice caves
The caves at Apostle Islands National Lakeshore in northern Wisconsin have been transformed into a dazzling display of ice sculptures by the arctic siege gripping the Upper Midwest. The caves are usually accessible only by water, but Lake Superior's rock-solid ice cover is letting people walk to them for the first time since 2009.
Image 1 of 5: People take pictures inside a cave at Apostle Islands National Lakeshore in northern Wisconsin, which has been transformed into a dazzling display of ice sculptures. Photo / AP
