221B Baker Street

The Sherlock Holmes museum is the most popular privately owned museum in the city of London. Although no one by the name of Sherlock Holmes ever lived here aside from within Conan Doyle's novels, this townhouse was used as a boarding house during the time of Holmes' adventures. In reality, the museum is stationed at 239 Baker Street, but uses 221b as it's address with permission the city of Westminster.
Sherlock's violin

tools of the trade

"VR" shot into the wall, as mentioned in His Last Bow

-Autumn Dudney