In London, I'd pick these things to see:
Inside of Westminster Abby. Don't miss that if you haven't seen it. It is *amazing*.
British Museum. Hey, is that *the* Rosetta Stone? Oh, and the outside of the Parthenon? Oh, and a guardian of the gates of the Assyrian capital? Etc.
Tower of London.
RAF Museum London (Hendon).
Churchill's war rooms -- where the war was run.
Get a good curry, fish and chips, and English breakfast.
I love London!
