at first glance gregor graf's 'hidden town' photos seem a little unreal, then you notice that all he's done to them is to retouch out the signs. interesting how such a small gesture can obliterate any feeling of a place's specificity. you can see more of gregor's work here. thanks to hans for the link.
[all gregor graf. from the series hidden town. 2004-7. top to bottom: warsaw, situation 5. london, situation 5. london, situation 9.]