No longer one of Croatia’s best-kept secrets, Pula is now one of its must-visit destinations. This Istrian city, the largest on the peninsula, holds one of the country’s most famous sights: a simply astonishing Roman amphitheatre. Known as The Arena and built during the 1st century, it’s still at the heart of the city and the centrepiece of many of its viewpoints. There are plenty of other Roman remains elsewhere in the city too, including a triumphal arch, temples and remains of the forum. Not that this rich Roman heritage detracts from the charm of modern-day Pula, both a glittering Adriatic holiday destination and working port.