This was a two or three minute exposure, and during that time a train came under the bridge I was standing on with headlights blazing, leaving trails in the photo. I used a 15 mm rectilinear lens on a 5D, and pointed the camera upward just a little bit, which means distortion is inevitable.
It's kind of hard to make out, but that's the Space Needle to the left of downtown. The exif and all that are posted here.