Nürnberg / Nuremberg would be fun just for the confusion factor - maybe people will finally stop confusing things (the number of people I've heard calling the Nürburgring the Nurembergring...) No idea if a fun or pretty circuit could be made there, though.
Oh, it already has been made. Back in 1947, in fact. (No idea whether the circuit is fun or pretty, though.) Fortunately they chose to call it the Norisring instead of the Nürnbergring or anything silly like that.