The nearby arched wall (see alternative pic below) of Brunel's old Railway Works at Swindon cast an arched shadow that the creators of Stonehenge would have been proud of.

The Mathematicians amongst you may be able to confirm that these arches should be able to tell the time of day, and month of the year, by their position relative to the wall of the main building.

Photographically, I'd really welcome advice on how to make the best of this image in PS - stronger contrast? transform the vertical lines? Any thoughts would be much appreciated as I think the picture has potential to print out.