Now, I'm not saying this is a country pub, but it IS one of England's oldest inns, so technically at one point it was a country pub. If you want to be pedantic about things, then just read on, but you'll miss out, pal.
The Jerusalem is built into the stone caves, beneath Nottingham castle. And some of the caves are used as bar space. In fact, the cellars beneath the pub lead a secret route into Nottingham castle. But enough about the caves. The food's also decent (pub grub like burgers and fish and chips), and the wine list's long as your arm.