What would be a good place to graffiti the words 'it's a small world after all' with a picture of a world with people around it?

What would be a good place to graffiti the words 'it's a small world after all' with a picture of a world with people around it?
Well, a good place would be huge building that many, many people walk by or look at everyday. That's way many people would be able to see it and admire it! :)