The black city of northern Etna, never touched by lava flows despite being the closest to the crater: the basilica of Santa Maria in lava and limestone, San Nicolò and San Martino of the three medieval 'nations' (Latin, Greek, Lombard), the Swabian-Aragonese walls, and the Archway Street. Indicative coordinates of the center.
In the app, check in on site: you earn a point and the AI guide tells you about the place in your language.