Last month I was in London for a conference and I was able to visit the Sherlock Holmes Museum at 221b Baker Street. It's very hard, when you visit this lovely little museum, to remember that Sherlock Holmes is a fictional character. The study is ready for his return, evidence from various cases are strewn about. The upper rooms have wax figures depicting scenes from various stories. It's definitely a must-see for Holmes fans.
And here is another must-see: The Cinémathèque Française has recently found a long-lost Sherlock Holmes film made in 1916 by Essanay Studios, starring the great actor William Gillette.