A bunch of shots from atop the Sears Tower, Chicago, IL.
Unfortunately, Phtosynth wasn't quite able to turn it into a full 360 degree display. The gaps are facing south and northwest.
This has great shots of the waterfront, and most of the big buildings of downtown.
This was shot with a Rebel XT and a 28-135mm lens. The details shots are at 135mm, and the wider shots are at 28mm.