Thunder Bay Island Light

Thunder Bay Island Light, located on Thunder Bay Island's southeast tip, is one of the oldest operating lighthouses in Michigan. The third operating U.S. lighthouse in Lake Huron was built here in 1831, but it disintegrated almost at once and was rebuilt in 1832 of local limestone. This 40-foot (12 m) 1830s light tower was raised 10 feet (3.0 m)) to a height of 50 feet (15 m) in 1857, and sheathed with brick. A fourth order Fresnel lens was installed.^[1] This 1857 light tower is the current Thunder Bay Island Light, although the tower has been further altered and is currently 63 feet (19 m) high.^[2]

• http://en.wikipedia.org/wiki/Thunder Bay Island Light