The same artwork as Escher's "High and Low" but in urban style. Walls are decorated by graffiti and bridges are bounded by barbwire. It's seemed that this construction can be found in slums of a large town.
Artist's deviantART profile http://rykerua.deviantart.com
Image was found at http://rykerua.deviantart.com/art/Urban-Escher-134673006