In the heart of the old town, the basilica, built between 1087 and 1197 to house the relics of Saint Nicolas, brought back by sailors from Bari, is one of the remarkable examples of Roman art in southern Italy. Its sober, powerful façade, sparsely decorated with a sculpted doorway whose columns are supported by bulls, and a few gemelled openings, is flanked by two towers. The Lions' doorway, on the left side, is richly decorated. Behind the main altar, there is a beautiful episcopal throne.

A number of "trulli" scale the hillside dominated by the Church of S. Antonio, to the south of the city. Several of them are open to visitors, offering an opportunity to discover this original way of living. From the rooftops, beautiful views of the city.

The museum is housed inside a large "trullo" dating from the 18th C., and today holds temporary exhibitions. From the roof, a gorgeous view of Alberobello.

The caves follow the course of an ancient underground river that filters down through the limestone subsoil of the Murge Hills. Discovered in 1938, they display an infinite variety of magnificent concretions: curtains, richly coloured stalactites and stalagmites. This grand spectacle reaches a climax at the White Cave, which glistens with calcite crystals.