Jerash in Jordan is the site of one of the most spectacular collection of Ancient Roman ruins. You literally have to see it to believe it. Whether it is the Arch of Hadrian, the grand Oval Plaza, the richly colonnaded street or the temple of Artemis.
The Hippodrome that survives in Jordan is one of the largest that still exists in the world. They actually recreate real chariot races there that you can pay to watch. There are still sections from the old seating that are available.
What is really fascinating is to see how the stairs were built. You would think that they would just pile up earth or other construction material to build the stairs but these stairs have stepped vaults under them. The spacing under the vaults probably served as shopfronts in the old Roman times.