I'm trusting wikipedia on this, but apparently this is a part of Zadok Ben-David's circle of silhouettes artwork called Restless Dream.
The piece is above the entrance to the Limehouse Link Tunnel in East London. From a distance I thought it was rats and not people - which would be appropriate given it's an entrance to a tunnel... but still quite an interesting piece...
Snowed again today!! Brrr... Hope Spring hurries up....
In glancing at the thumbnail, it looks like an extreme closeup of a roughly woven fabric. Enlarged--well, WHOA! There's a lot to see in this; I'd love to see the real one someday!