The Zalia Castle is easily accessed by the road up from La Viñuela Dam address Ventas de Zafarraya-Granada.
Although hardly can be seen today due to their state of total ruin, Zalia Castle had an irregural plant of approximately 120m x 150 m. You can still see some towers and remains of the wall between the gorse and scrubland existing around.
Zalia Castle had a double walled, both being very irregular. Account outside with thick masonry walls, punctuated by towers of square section and some circular; they have disappeared several stretches of wall, while other very displaced. The fortress provided inside of a water tank and a large entrance gate flanked by two large masonry towers regrown with mud on top. Its main entrance was facing north.
It is believed that it was a fortress rebuilt by the Arabs on the other primitive built by the Phoenicians. In September 1485 it was conquered by the Catholic Monarchs. After the war of the Alpujarras the Zalia Castle became prison-bishopric.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.