Here at Baker Street, you can find one of the most famous addresses in the history of man, 221B Baker Street.
There is a real address at 221B, and it is the Sherlock Holmes Museum. Here you can walk through and see bits and pieces of Holmes lore, such as the Study in Scarlet, above.
Also at Baker Street is Madame Tussaud's, the well-reknown and greatest wax museum on the planet. They do such a great job, that you almost think that they will come alive. Well, they have been known to put real people amongst the wax statues and surprise visitors. Besides, where else can you find Marie Antonette's chopped off head on a post, than at Madame Tussaud's Chamber of Horrors. Not to mention that at said Chamber of Horrors, you can also find a wax statue of Hitler. Stay classy, Madame.
Right next to Madame Tussaud's in the London Planetarium, which we didn't see.