These make me smile! I just LOVE the pics of earth at night that show all the city lights and roadways. They start about halfway through this slideshow of pics by Astronaut Sunita Williams. I hope you enjoy them!
http://www.slideshare.net/rahul/photos-of-earth-by-sunita-williams
http://www.slideshare.net/rahul/photos-of-earth-by-sunita-williams