An amazing photo of San Francisco following the great earthquake of 1906. At first, it looks like simply a beautiful panorama of a great city.
Then you zoom in on any part of the photo you want and realize that the resolution is so good you're starting to see buildings torn in half, and entire lots razed to the ground. It reminds me of images of Japan following the recent earthquake and tsunami. Here's one random zoom I did - note the empty lots, the big building in the upper right missing some of its top, the building on the lower left burned out.
Go check out the photo and use the buttons at the bottom right of the image (plus and minus) to zoom in and out.