I look forward to visiting Dura Europos myself one day. Here’s a fun travel-logue by a traveler:
Dura Europos was certainly the most attractive archaeological site I visited in Syria. A ruined citadel sits atop a ridge overlooking the river and a large city wall that is still defined in several places bounds the entire site. Numerous temple remains dot the site but virtually nothing remains of any of them, with the notable exception of the Christian church, which I was able to find. This is rather exciting because it is the oldest church of certain date in the world. Overall, the site is really quite impressive, and aesthetically, it was my favourite ancient site in Syria.