The Great Lakes, with the rivers, canals, and channels that connect them, form one of the busiest waterways in the world. Lighthouses were needed to secure the safety of ships over these freshwater seas. But over the hundreds of years since the first lighthouse was established on the Great Lakes in 1781, these structures have come to represent something beyond their initial navigational function. Often situated on remote and beautiful shorelines, lighthouses hold a special fascination for people, serving as symbols of courage, perseverance, safety, and comfort. B is for Beacon: A Great Lakes...