If you’re going to see an opera, you might as well see it in style, and this amphitheatre, the eighth largest in the Roman Empire, is the perfect place to do so. Showing operas, ballets and classical music concerts in its 30,000-capacity arena, built in 30AD, the arena is at its best during the warm summer evenings when the annual opera festival takes place, although you can take a look around at any time of year. Not an opera fan? Fear not – many pop music acts have performed here including Duran Duran, The Who, Rod Stewart, Spandau Ballet and, more recently, One Direction and Adele.