I adored this huge rendering of the Getty Images watermark across a car park wall. As Weburbanist points out, the work sits in some digital/real world uncanny valley:
[Tremblin] spoofs the ubiquity of digital watermarks by photographing a physical equivalent straight-on. We are so used to seeing these as after-print overlays on pictures, it takes conscious effort to realize it is part of the actual landscape.
Click the links for more images.