Julian, I tried them in B&W, but they didn't work for me. The gray sort of mushed everything together. In color, I have a definition of the muted tones that help lead the eye into the distance. Also seems to add contrast that didn't exist in B&W. The shots are straight JPEGs. There was no post processing.
Tom, I thought of getting that van out of the picture with Photoshop, but when I tried, there was something about it that looked artificial. What I did like about that way was that this could have been a photo taken in medieval times. I think that many of those structures have been there a very long time.