Long ago, Berwick-on-Tweed was a prize in the Anglo-Scottish wars over old Northumbria. For centuries now it has been English, but the casual visitor (me) has a hard time telling which kingdom it belongs in (Northumbria?). The big social issue seems to be whether dogs should be welcome in pubs.
It is not a flashy place and may never have been, but Berwick had its artistic champion in the mid-20th century, when one L.S. Lowry did many striking paintings of the streets and the people. There is now a downtown "trail" on which you can visit sites he made famous, and which are pretty much the same.
A genealogy site has a good selection of Berwick neighborhoods and the paintings they inspired.