== Picture of a corridor == 

 IMHO this picture conveys nothing, which is why I removed it. Because of the depth of the perspective all sense of scale is lost. Just how far away is the end of the corridor? This would make perfect sense if you were there and could walk down the corridor, but the picture doesn't convey scale. BTW I was in hospital a lot last year and I used to walk regularly down a corridor exactly like this, only better decorated. )