Thought I'd have a crack at making an England version:
-Winterfell = Manchester
-King's Landing = London
-Oldtown = Chester, or York.
- Casterly Rock = Bamburugh Castle, Northumberland.
- Highgarden= ??
- Eyrie = Cornwall
- Harrenhal = Birmingham (?)
- The Wall = Hadrian's Wall
- Castle Black = Carlisle
- Dorne = ??
Wasn't sure about a couple, Dorne is quite difficult because we don't have any dry and arid areas in England, and being a small country London is applicable to lots of different categories. Still, at least we have actual castles and actual walls which make the comparisons quite easy.