Sherlock was filmed in London & Cardiff in the United Kingdom.
Locations
The street outside Sherlock and Holmes' flat.
Scene where Apartment that Sherlock and Watson rent from Mrs. Hudson throughout the series.
Scene was shot on North Gower Street in London, it's about a 25 minute walk from Sherlock Holmes' literary address at 221b Baker Street
Real
In movie
Aldwych Tube Station
Scene where Sherlock and Holmes are exploring an underground tunnel.
Scene was shot Aldwych Station originally opened in 1907 as Strand Station and acted as the terminus for a short branch of the Piccadilly Line. In 1962 low ridership caused hours to be reduced and the station was eventually shuttered in 1994. The accessible tracks and preserved platforms make this station a popular filming destination.