Nestled at the top of Wisconsin sits a cluster of islands on Lake Superior that is home to what some call the finest collection of lighthouses in the country. Guiding the way for ships on Lake Superior, Nine light stations were tended by keepers. Those that chose to face the winter on their island homes faced unimaginable trials.

One woman faced one such trial when her husband left to go fishing and didn't return for days. On this episode of America's National Parks, the Apostle Islands National Seashore.