Gwent in Wales is no longer a local government council since 1996, but it is still both colloquially and ceremoniously used to describe the south-east corner of Wales bordering England. It’s now been split in to several different districts including Monmouth, Newport, Blaenau Gwent, Torfaen and Islwyn.
There is much to do in the area of Gwent, around the River Usk, particularly if you are interested in Roman history. The city of Newport itself is small enough to navigate by foot. Chepstow Castle is also within easy reach and worth a visit.