Web Urbanist just put up a nice collection of art installations on buildings. They're all great designs, particularly the tentacle piece above:

An artist calling himself ‘FilthyLuker’ installed inflatable octopus tentacles in the windows of an unnamed building in June of 2009, making it appear as if the building is being devoured by a bright green kraken that somehow emerged from the sea and got stuck inside.

Does anyone know where this building is?

Link