Sorry for the filler but it didn't occur to me to take a photo until late and my idea didn't pan out. Now that it's bedtime I've gone through the archives to bring you this shot of a bridge outside of Philadelphia.
But then I made some changes after, most likely adjusting or adding gradient fills as needed since those actions tend to darken my shots too much. I also desaturated it a bit and ran it through the boost effect at Picnik. Sorry I can't give you a better tutorial!
@kmwilliams To answer your question: magic. Ok, not really. I actually edited this back when I took it so I don't remember all of the details but I know I started with one of the actions from this set: http://elestrial.deviantart.com/art/Ghost-Stories-Photoshop-Action-192944578
But then I made some changes after, most likely adjusting or adding gradient fills as needed since those actions tend to darken my shots too much. I also desaturated it a bit and ran it through the boost effect at Picnik. Sorry I can't give you a better tutorial!