Life in Genoa has revolved around the sea for centuries. A city of merchants and shipowners, its historical centre has grown around the former port. The Bull, Bigo Tower, and the Aquarium by Renzo Piano are symbols of this urban region, the modern look of which is the fruit of restoration work dating from the beginning of the 1990s. Charming narrow lanes (known as ?caruggi') lead off from Caricamento Square, which is the historical centre of Genoa and one of the biggest city centres in Europe. Here, the shopkeepers, craftsmen, and greengrocers in their little shops are always busy, a rare feature in other Italian cities. By losing yourself in the maze of streets, among the historical palaces and multiethnic districts, you will come to San Lorenzo, a square dominated by the cathedral that bears the same name, with its characteristic façade of black and white stripes. If you continue walking up, you will leave the stifling atmosphere of the narrow alleys and arrive at De Ferrari Square, which opens onto the monumental fountain. Not far from there, by taking Via Garibaldi street and continuing through Nunziata Square to Via Balbi street, you will probably not be surprised to learn that this part of the city has been listed as a World Heritage Site by UNESCO.