The Museum of London always puts on excellent exhibitions, although the previous exhibitions we have attended have both been at the Museum of London Docklands.
The Museum of London itself is free; although the special exhibitions usually have an entry fee (given that we spent an hour and a half wandering through the exhibit was a bargain at £10).
The exhibit ranged over topics as diverse as the depiction of Conan Doyle's characters in TV and film to Victorian/Edwardian London (photographs, paintings and maps) to Conan Doyle himself; all of this and more put together in a fantastic (very atmospheric) setting. The exhibition did not allow photography but the accompanying book (£5 off with an exhibition ticket) has all you want and more; and the gift shop was full of tempting items, including the beautiful anthology of stories with copies of original illustrations from the magazine in which they were published.
The exhibition runs until April 2015.
Sherlock @ MoL
An album by TheMrsNatG
Sherlock Holmes Exhibition at the Museum of London
» You can also view all 12 items as a slideshow