The Theatre and Aqueducts of the Ancient City of A by Zoë Sheng
Great theater, lesser great aqueduct. You also get some ruins up the hill behind the theater which are actually easy to miss if the crowd flows into the theater entrance, but you won't miss much out there.
Well preserved, not as good as in France or Italy of course, and nowhere near as impressive decorations. I am not sure how exactly it is trying to keep unique but it's worth a visit for sure.
While I was visiting there was also some filming done as you can see in the pics, which meant having to hide out in the upper tunnels like not having paid for an entrance ticket back in the days? :))
With the theater facing north you will need to pick a good time for taking photos by the way .