Opposite the Odeon is a sprawling archaeological site at the intersection of the ancient city’s primary north-south (Cardo) and east-west (Decumanus) streets.
You can inspect the 3rd-century surface of the Cardo, still etched with grooves from ancient wagons.
There are also two early-Christian basilicas, a stadium from the 2nd century BC and a gymnasium from the same period with 17 white marble columns.