Neatorama reader Liberal Avenger (Hi LA!) suggested this giant photo of Boston:
The URL points to a 90000 x 40000 pixel image of Boston on a crystal clear day.
The image consists of 612 separate images taken from the Back Bay's Prudential Tower Skywalk using a digital SLR with a 300mm lens. The 612 images were in turn stitched together digitally.
One can pan and zoom about the image using the Google Maps interface that appears on the picture. The zoom is amazing...
Remember the photo-scanning sequence in Blade Runner?