Pula Arena is one of the biggest Roman amphitheatres in the world and certainly one of the best preserved. Though unavoidable in the city's landscape, it is the biggest attraction in Pula and deserves a closer look. The sails that used to fly above spectators watching gladiatorial combat are no longer there, so the venue is shade free and battered by the sun in summer. The best times to visit, particularly if you're taking children, are outside of the main season. Opt to visit on a cloudy day, in the morning before it gets too hot or in the evening when the sun's strength begins to wane. Visiting rock, classical and dance music stars also play here, the Arena providing a spectacular backdrop to their performances.