One of the best-preserved ancient Roman ruins sites isn't in Rome at all or even in Italy. It's the arena in the city of Pula, which lies at the southern tip of the Istrian Peninsula in northern Croatia. Pula became an an important Roman outpost during the waning days of the Republic. Construction of the arena began at the outset of the Empire and was completed in 68 AD. Considered one of the top attractions in this Southeast European country, you can check it out from above in this drone video by ImagesCairns.