Shadow graffiti is some of New York City's best street art. It's free, democratic and completely transient—here today, maybe gone tomorrow. Grates, fences and tall buildings etch awesome patterns when the sun is overhead. I run across jaw-dropping graphic shadows in the most mundane places, like under these elevated train tracks outside Yankee Stadium in the Bronx. A huge crowd milled outside the stadium gates, but this street right next to it was closed to traffic and empty. I got lost in the act of watching the lines converge. In the near distance, a colorful arrow on right seemed to say, "Check this out." In the middle distance, three pedestrians crossed in a single line like a Bronx version of the Abbey Road album cover. In the far distance, perspective narrowed the initial broad lines to a point. People were waiting for me. So I dragged myself away to the game.