I believe on my 5 second search on Google that this is the Wrigley Building in Chicago. I shot it from the third level across the street from my hotel and it was something I saw most days as I was heading off to work.
Post processing this was all about the buildings. I did very little to the base image. It is mostly out of the camera. Since I wanted the buildings to be the focus I used Intensify CK and selected a filter that I liked then brought it back into Photoshop and started masking it in. Then took it into Color Efex and used Pro Contrast to do a bit of color correcting and called it done.