I would go to the cultural center of the world... Paris.
The spirit of all the great artists from all over the Europe who have worked there is still touchable.
Cultural Center?
Jee, I didn't know filthy streets, swaths of brown faces and overpriced trash counts as culture?
But I admit it has its nice places, you just need a few days to look for them. And even then they'll be over run by fat, ignorant tourists.
OP, if you want to go somewhere nice, ignore the major tourist hubs and blaze some trail. Smaller towns in Scandinavia, Switzerland and Greece would do you well. Don't come to the UK, there's really fuck all here. Do London if you must and get out. Eastern Europe is all right but you can't trust anyone. It's in their blood to rip you off.
Scandinavia. You'll spend your children's inheritance but it's really nice. You can't go wrong there.