This surely was once a Tube Station Entrance?
Oh yes...so it was....
Hyde Park Corner station was opened by the Great Northern, Piccadilly and Brompton Railway on 15 December 1906. The original, Leslie Green-designed station building still remains to the south of the road junction, notable by its ox-blood coloured tiles; it is currently used as a pizza restaurant.
This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 2014年2月2號, 21:07 by Ham. On that date, it was confirmed to be licensed under the terms of the license indicated.