I just got back from Houston, and this was out the window of one of the hotels downtown. I had to shoot it through the window (28th floor, they don't open!) so I put the camera right next to the glass and used an aperture of about f4.5 to help keep the dirt from showing. Since I had a tripod but forgot my hot-shoe bubble level, I had to straighten the perspective out just a little in Photoshop; also because I wasn't exactly in the middle of the shot (would have needed repelling gear for that).
I thought it was interesting because of the symmetry and lack of scale until you think about what you're looking at. Comments appreciated.