The city of Bari, capital of the same province, is the second most important city in southern Italy in Naples, and in direct competition with it. The city is known for preserving the relics of St. Nicholas, patron saint and protector of the city, in the popular Basilica.
Beyond the Basilica of St. Nicola, it is worth visiting the historical centre characterized by narrow streets as well as several palaces and churches built between the medieval period and the XVIII century.
Outside the city, you can visit the Caves of Castellana, which grows on a medium that varies from a few tenths of a millimetre to several centimetres per year.