The Berlin wall fell nearly 25 years ago, but the city is still divided in many ways. You can look at various economic and cultural differences between the sides, but a simple image from space can show the difference simply based on light. The the image below, the yellow lights are in East Berlin and the greener lights are showing West Berlin.
You can view the image in Google Earth by loading this KML file. The image was captured by European Space Agency astronaut Andre Kuipers aboard the International Space Station, and was released back in 2012.
(via Geographic Travels)