Tarifa Castle was built in 960 by the Abd-ar-Rahman III, Caliph of Córdoba. When Tarifa was taken over by the king of Castile, Sancho IV in 1292, the castle was handed over to Alonso Pérez de Guzmán for its defense. Pérez de Guzmán get the nickname of 'Good' (el Bueno) by refusing to hand over the castle in 1296 to the besieging forces of the Infante Don Juan, the rebellious brother of the king Sancho, and the Marinids, in exchange for the life of his son.
Due to the castle's irregular oblong shape, some believe it was built on the remains of a Roman fort. To the east, two high towers protect the castle - one is called Torre de Guzman El Bueno; the order for the Moors to kill Guzman's son was given from here. Outside the castle you can see a statue of the king who first reconquered the town from the Moors in 1292, Sancho IV. There's a statue of Guzman himself just over the road on the Alameda.
Recently refurbished, the castle is open to visitors. The coast and mountains of Morocco are visible from its towers.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.