One of Europe’s most stunning outdoor theatres is the neoclassical Arena Sferisterio, a grand colonnaded affair resembling an ancient Roman arena, which was built between 1820 and 1829. Its acoustics are second to none. From mid-July to mid-August it's the backdrop for the Macerata Opera Festival (www.sferisterio.it), one of Italy’s foremost musical events, attracting the cream of the operatic world.