La Jument, Ushant, France

La Jument on a calm day, seen from Ushant, standing alone on its reef in one of the roughest stretches of water off Brittany. Building began in 1904 and the light was first lit in 1911. Calm is not what made it famous: in 1989 Jean Guichard photographed a huge wave wrapping around the tower while the keeper stood in the doorway, and the image went around the world. Keepers left in 1991, and it now runs automatically.