I love the Flatiron Building at 5th and Broadway in New York: it's a brilliant and beautiful. I took this picture on a long walk in Manhattan last June; I walked a couple miles out of my way to see the building.
Kottke recently linked to a high-resolution picture of the building in 1910, when it was only eight years old. It's an engrossing photo with enough detail for a million questions. What did the advertised cigars cost? What's that guy with the ladder doing, just right of the building's prow?