It's interesting to see, but the amphitheater is actually new. Plus, it's closed to the public, it seems like you can only visit when events are taking place there.
It was in October 2024, it is located in the upper part of the city, it is better to climb from the embankment where the monument to Ataturk, the entrance was closed with a chain, but in the middle there was a gate at which you can push back the latch and pass. It's a nice building, the amphitheater is not as big as in Ephesus and is new in appearance, but it's still worth a visit