Adjusted contrast and exposure in ACR
Lens correction: adjust perspective and barrel distortion.
Brighten the reds with Hue/Saturation
Reduce magenta CA with Hue/Saturation
Added clouds from another image
Crop and fill lens correction voids with the clone tool
Sharpen building.

forum discussion: http://forums.dpreview.com/forums/read.asp?forum=1006&message=32832637
original image by chris91: