Antilla or also the "Isle of Seven Cities" lays according to the legend in the Atlantic Ocean, far to the west of Spain.
It originates from an old Iberian legend, set during the Muslim conquest of Hispania in 714. On their escape from the Muslim conquerors, seven Christian bishops and the archbishop from Porto set sail westwards into the Atlantic Ocean, landing on Antilla, where they founded seven cities.
Some people suppose that Antilla realy existed and sank during history of Earth. Last time Antilla has been seen was in 1892.