The centre of action is Piazza Garibaldi, a handsome square dominated by the elegant 14th-century facade and Catalan-Gothic campanile of the Cattedrale di San Nicolò.

From the piazza, Via Salamone leads past crumbling Franco-Lombard palazzi to the Basilica di Santa Maria Maggiore, a 1767 reconstruction of a 13th-century church destroyed by a landslide in 1757. The terrace offers a view of the ruins of a Norman castle, perched on a rocky crag above town.