The remains of the buildings of the commercial part of the ancient city of Smyrna are well preserved. The museum area is not very large, not like in Ephesus, but the preserved skeletons of the Roman period, the source of Alexander the Great, are impressive. In general, there is a lot to see in western Turkey
Agora, it is interesting to plunge into the atmosphere of the old town. It's a pity that we didn't go on a tour in Russian(. It would be wonderful to hear how the city was built and how it lived in the distant times. I definitely recommend you to visit.
A huge set in the open air. The cost of the visit is 25 euros plus a guide in Russian 350 lira. There are a lot of people, a lot of places to go and see.