San Giovanni Castle is located at an altitude of 1200 meters above sea level, and its origins date back to 532 AD, it was built by the Byzantine Emperor Justinian. This castle has undergone many changes, witnessed some battles and was occupied during the Second World War, and today it is one of the attractions of the historical city that offers a magical view of the city, the bay and the distant horizon, which can be reached via a long walking path and 1350 steps.