Shaftesbury Avenue

 was a street in London.

There were numerous theatres and a Forbidden Planet megastore on the street. (PROSE: In Search of Doctor X)

Piccadilly Circus was located at the intersection of Shaftesbury Avenue and Regent Street. (PROSE: Endgame)

Behind the scenes
The Forbidden Planet megastore on this avenue was also used as the basis for the fictitious Prohibited Sphere Megastore in The Fourth Wall.