I promised a friend last year that we would visit the Sherlock Holmes museum after the holidays since she's a fan of some of the movies. I love the BBC's Sherlock but I've yet to read the books or even watch the films. Despite that it was still fun looking around 221B Baker Street (my dad was surprised that it's actually located there. He thought I was joking). Tickets are £8 and there are 3 floors with small rooms on each of them but I think it's worth it if you're a huge fan. It's also great for interior design inspiration!