Caerwent is unique in this respect since, although it had some defences, it was not primarily a fort. The remains of its walls, originally 5.2 metres high and more than 2 metres wide at the base, are also unusual, being the most impressive town defences to survive from Roman Britain and amongst the most perfectly preserved in Northern Europe. They are 500 metres long on the south side, with 6 towers, and are constructed of limestone, sandstone and grit with pebble fillings, being held together with extremely durable cement. Caerwent (44 acres) is the only Romano-British town in Wales and was the administrative centre of Britannia Secunda, a division of early Britain.
Finding it all
Caerwent is on the 73 bus route from Chepstow (where you can visit the castle or lounge by the River Wye) to Newport (where you can complete your Roman findings in the museum). I know some of you cheat (tut! tut!) and go by car: you are not far from Roman Caerleon in that case or, if you play by the rules, you can transfer to the no 60 bus or local services at Newport to go there.