The largest opera house in Italy, the third in Europe: the neoclassical temple designed by Giovan Battista Basile, inaugurated in 1897, with the staircase immortalized by the finale of The Godfather III. It is open for visits every day; if you can, return in the evening for an opera under the grand chandelier.
In the app, check in on site: you earn a point and the AI guide tells you about the place in your language.