The fortress of San Fernando is located at less than one kilometre from the more famous Santa Barbara Castle. It was built during the war of independence against the French in 1813 on top of the Tossal hill. The name San Fernando is a tribute to Fernando VII of Spain, a Spanish king from the beginning of the 19th century. The castle wasn't a very high-quality structure, which means that it is not in very good condition.
You enjoy beautiful views of the city and above all a very nice view of the Santa Barbara castle.
The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.