Yes, railroad tracks and graffiti. But I liked the color palette and the autumnal light.

So, beyond the railroad- and graffiti-cliches, what did I do wrong?

NSFW

The railroad tracks and the graffiti....are the best part of this picture..!!...What you did wrong...was position this model...on the tracks like that...(ugh...not attractive at all...from any angle)....IMO...!!...Crop her at the waist and look at the shot from the waist up...looks good.....(but with so many other ways to pose her from the waist down).....this could have been a *Killer* shot...Great coloring....(you are right about that)..!!...Instead, you posed her weirdly on the tracks...made it look...seedy..!!...Sorry...just my first thought...from a woman's POV..!!

I think that Julietsdream has covered it pretty well.  Everything looks good in this photo except the pose.  A different angle and/or longer focal length might have helped.