London, UK
The Tate Modern is a former power station. It's massive. Again, I couldn't care less if you don't like "modern art." Ya gotta go in this building. It's amazing. And free. Have I mentioned all these museums are free? ALL these museums are FREE. And now that it's lunchtime, we ate outside on the vast lawn rolling down to The Thames, With the musicians playing and the boats going by. Great day.
You could go upstairs and eat at any of the waterview cafes, too. I wen...