The amphitheatre of Pula is the only Roman amphitheatre to have four side towers and all three levels preserved. Built between in 27BC and 68AD, it is one of the six largest surviving Roman arenas in the world, and the best-preserved ancient monument in Croatia. Overlooking the harbour in the north-east of the town, it seated 20,000 spectators. In summer there are weekly re-enactments of gladiator fights, and it is also used for plays, concerts and the September Outlook festival. Look out for the slabs that used to secure the fabric canopies that sheltered spectators from the sun – wrote the author.
Pula joins the likes of Koh Ker in Cambodia, Choquequirao in Peru, Pella in Jordan, Vatican Necropolis in Italy and Takht-e Soleyman in Iran on the list which features some stunning sites. Click here to see the Top 10.