Sorry, I don't have a twitter account. Dave solicited on twitter very recently for a bridge photoshopped into a photo. I used GIMP (free software, works nicely I think) A pro would maybe use Fusion 7 (I think it was) for compositing, but I don't have the free version installed. They have since removed the free Fusion option on their website, maybe a pr stunt from a previous time a long time ago, a few of years or so.
Hopefully this won't be considered widly off topic in the general section, couldn't find any general image thread (not saying that is a good idea, wasting everybodys time watching it, but that would be a category).
This is.. sort of a road bridge, isn't it?
Only bridge photo I could find online, with the proper perspective.