An interesting perspective. I'm not necessarily a fan of how the front of the bridge cuts the photo in half, mostly because of the unfortunate graffiti on the bridge.
The first thing that I saw in this picture was the red on the stone in front. Didn't even SEE the background until I read the title. If you had positioned yourself so that the bridge was OOF, this would have been a much better shot.
I really like the composition, just in my opinion I would also like to see more of the stone structure, I would do the smoothing a bit less. - but it's just me!