I was looking through some photos from last year and I discovered this one. It is not just about the graffiti but the texture of the concrete, bricks, steel bars, iron anchors and the like. Unfortunately the original was a little flat so I added a little tone mapping and some color adjustments giving this more pleasing, if slight exaggerated, result.
Canon 1D Mark III, Canon 17-40/f4L
17mm, f5.6, 1/80 sec @ 400 ISO