The medieval country castle of Korykos is located on the eastern outskirts of the resort of Kızkalesi in the Erdemli district of the Turkish province of Mersin, in rugged Cilicia. It was built in the late Byzantine period, had various owners and was in use until the conquest in the 15th century. It was located on the western edge of the ancient city of Korykos at its port. The remains of a mole can be seen at its southwest corner, which may have connected it to the girls' castle (Turkish Kız Kalesi), which is located on an island about 600 meters away.
Source: Wikipedia