Sherlock Filming Locations

Sherlock was filmed in London & Cardiff in United Kingdom.
Zoom to: Cardiff, London

187 North Gower Street

221B Baker Street

Apartment that Sherlock and Watson rent from Mrs. Hudson throughout the series.

Forest Fawr Country Park

Hound Caves

Sherlock and Watson follow Henry Knight to the caves where he saw the Hound in his youth in episode #202 "The Hounds of Baskerville".

Aldwych Tube Station

From episode #301 "The Empty Hearse".

Source: Wikipedia