Discover the highlights in the historic center of Bologna with an expert guide.The tour starts from Piazza del Nettuno, where you'll admire the namesake fountain and symbol of the city, and continues on to Piazza Maggiore.Here you'll visit the imposing Basilica of San Petronio, one of the largest in the world, and marvel at Palazzo Re Enzo and Biblioteca Salaborsa, the main public library in Bologna.Discover the oldest library in the world, the Archiginnasio, and the wonderful Basilica overlooking Piazza Santo Stefano.You'll also see the Two Towers, Asinelli and Garisenda, soar over the city, and enjoy the flavors of local food in the Quadrilatero, the historic market of Bologna.