Izmir's Ancient Agora was once a bustling Roman bazaar and today you can still see Colonnades of Corinthian columns, vaulted chambers and a reconstructed arch making it one of the best preserved Agoras in the world.
The ruins of Alexander the Great's Castle, Kadifekale (meaning "the velvet castle" in Turkish), sits atop a hill overlooking the city below.
Visit the Archaeology Museum containing many Greek and Roman artifacts. Be sure to take a look at the head of a gigantic statue of Domitian that once stood at Ephesus.
This old stone building houses colorful displays of local arts and crafts and you can learn about pottery, embroidery wood-block printing. You can even see how they make those little blue and white 'evil eye' beads, a craft dating back hundreds of years.