I Want to Travel

I've spent three days collecting images and film clips from New York, Moscow, London and Hong Kong. It has made me really want to go travelling. Well, I'm alredy in London of course I want to go to the other cities. Especially New York looks amazing... Lucky I am actually going on a trip soon(ish), I'm going to Barcelona with James and my parents, wihoo it's gonna be so much fun! I have never been there, does anyone have some good tips on things to see or do?