Marking dangerous coastlines, shoals, reefs or rocks, these light emitting (or sound) structures offer a navigational aid for all mariners for millenniums. With Michigan having past and present over 150 lighthouses (most in the country), there are approximately 1000 throughout the United States. While today's technology has made many of these beacons obsolate, their popularity anbd helped saved many from disappearing....Walter Pietrowicz
Alphabetical list of U.S. Lighthouses