There's a little park next to the city wall. There's remains of Roman columns here as well as a Roman heating system. It as one of my favourite parts of Chester actually.
Several Roman column bases and masonry from Roman colonnade and underground heating system have been put on display in this small park.
The foundations survive from the Roman tower which stood just inside the south-eastern corner of the legionary fortress. At the top of it there was probably a rock-hurling balista.