The Globe Theatre...St. Paul's Cathedral was neat but it doesn't even come close to being as beautiful as Westminster Abbey. Both recently went through extensive cleaning that cost in the millions.
Kensington Palace is a really neat place to visit. They have a Princess Diana exhibit, Princess Margaret's old apartments, and you get to see Queen Victoria's rooms. They have the bed that Victoria was woken up in and told she was now queen. Some very cool history here!
I couldn't wait to see the Peter Pan statue, and here it is. There is just something so enchanting about it. It made you feel like a kid again, and isn't that what Peter Pan is all about? ; )