If you're talking about countries I suggest Italy,Spain,Portugal or France. All really nice countries and the capitals are sick. Don't come to the UK it's boring.
I have to agree with MCGeek, all of those countries are nice to visit, I would strongly suggest NOT coming to the UK as there is nothing to do at all, and there is a huge chance of bad weather whenever you come..
If you like old art things go to Italy. If you are interested in heritage go to where whatever you are. But England or France are great places to go as well