Au Sable Lighthouse View - Public Domain image, National Parks Gallery

Au Sable Lighthouse View of the shallow waters of Lake Superior and the Grand Sable Dunes. The Au Sable Lighthouse was built here because of the dangers to navigation. The shallow water extends almost two miles out into Lake Superior and creates a risk to ships. The Grand Sable Dunes and Lake Superior combine to create quickly forming fog banks that also pose a risk to navigation.