2. Ephesus.
Not to be missed, the mighty ruin of Ephesus is a city of colossal monuments and marble-columned roads.
One of the most complete, still-standing famed cities of antiquity in the Mediterranean region, this is the place to experience what life must have been like during the golden age of the Roman Empire.
The city's history dates back to the 10th century BCE, but the major monuments you see today all date from its Roman era when it was a thriving commercial center.
In particular, the Library of Celsus, the complex of frescoed terraced houses, and the Great Theater all point to the wealth and importance of Ephesus during the Roman period.
A sightseeing trip here will take at least half a day to cover the major highlights and longer, if you really want to explore, so make sure you plan your visit so you don't feel rushed.