Made completely in LaserWeb4. MDF frame milled and art lasered ( we need a module for spray paint )
The first to tell place a maps.image of this location I will send him a $5 Amazon store credit 
Good option may be an mini automatic gun. It can be like bit for pocket with a diameter of 5-6 mm. only open and close an automatic air valve with the commands M3, M5.
It will be neccesary adapt the Z heigh axe, more hight more diameter of spray. It coul be an idea.
That looks suspiciously like a stylized view of Bastille in Paris. But just far enough off to make me wonder if it really is.
@Stephen_Baird very similar
Very nice sir.
My vote is the Death Star 
@Eric_Pavey ​ never thought about it but no, it Is from this world
Place de Mexico, Paris, France!
https://plus.google.com/photos/110613738839537503268/albums/6393555158493386465/6393555157436123170
@Matej_Korlaet ​ you are a winner. send me your email