It is actually two castles (Northern & Southern) in Pharaoh's Island in Aqaba, Gulf of Red Sea.[1] [2].
It was built by Salah El-din (Saladin) in 1170 AD. The island had another castles before in old Arabic era and in 1116 AD by Baldwin.[2]
The Castles have played a major rule in the crusades, Mamluk and Ottoman eras.[2]