Bells in the Old Post Office bell tower as seen through a little window in the stairway leading up to the actual observation deck above the bells. The big wooden wheels with ropes around them are what actually activate the bells—the ringer stands a floor below in a room with about 8 ropes coming down through the ceiling and pulls the appropriate rope to ring the appropriate bell. I guess if you're talented you can make some real music.
I've been wanting to get to the top of this tower since I first learned about it and we finally made it a couple of weeks ago. And while the bells are cool, the best part is the view, which I'm saving for tomorrow.