That intersection

No spoilers. In The Dark Knight, there's one scene in which some vehicles go from traveling above ground in Chicago to a down ramp that takes them to the underground street levels in the loop. If you've seen the movie you'll probably know which scene.

I stood out there a few years ago and took a long exposure picture of that ramp down to lower Wacker Street. I recognized it in the movie because of the Lyric Opera sign.

Entrance to lower Wacker St. in Chicago