Fata Morgana off the Tyrrhenian Sea at sunrise, east coast of Cap Corse from Pietracorbara beach. Fata Morgana, a rare optical phenomenon resulting from a combination of mirages, the disruption of light rays as they pass through a thermal gradient in the atmosphere, was first reported in the Middle Ages by crusaders sailing the Mediterranean, who claimed to have seen fantastic castles reflected in the mist. Corsica, France