The castle of Frederick II (1239-1250), once by the sea: the lava flow of 1669 surrounded it with land, shifting the coastline. Today it houses the Civic Museum with the Biscari collections; its four cylindrical towers have witnessed the Sicilian Vespers and the Aragonese parliaments.
In the app, check in on site: you earn a point and the AI guide tells you about the place in your language.
