Obviously at Hyde Park Corner, you can find Hyde Park, but closeby is also Buckingham Palace.
Unfortunately, we never got a chance to see the changing of the guard. Note the hot dog carts right in front of the gates of the Palace. Man, that's classy.
Out in front in the Palace is the quite large Queen Victoria monument. I guess when you have a reign like she did, you can toot you own horn.
Back by Hyde Park, you can find the Royal Albert Memorial and Hall. Albert was Queen Victoria's husband and first cousin. He must have had it going on, because look at the memorial she erected for him.
Here's the aforementioned Albert Hall, which was featured in the Spice Girls Movie. Of course, only I would make that reference.