What our cities would look like at night without light pollution

Artist/photographer Thierry Cohen has created some really cool images which show what several major cities worldwide would look like if there was no artificial lights (nor moonlight) masking the starry skies.  The result is really cool and can be viewed at his website.  He did this by shooting images of the night sky in places with similar latitude but no city lights, then overlaid them onto darkened photos of the cities themselves.  Very cool.