Fort Punta Christo was built at the end of the 19th century by the Austro-Hungarian Monarchy to defend City of Pula, their main naval port. Situated on a small peninsula at 45 meters above sea level, Fort Punta Christo offers a breathtaking view of the entrance to the Bay of Pula, its breakwater, as well to National Park Islands Brijuni on the other side. The fortress is surrounded by a deep ditch and there are three entrances leading to the fort. Inside the fort are three courtyards through which you can enter the underground areas of this magnificent structure. The fortress has as many as 270 spaces, covering an area of over 10,000 m2.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.