Great coloring in the the rusty tones of the rails and superb details on this image, Carlos! The vignetting-like light makes it even more moody. It adds a bit of "extra-darkness" at the outer parts of the photo, enhancing thus the center part - the rails!
From this point of view, one could also crop a bit of the top of the image, in order to leave the upper part of the platform and the plants out, and give even more extreme power to the main object. (see also attachment.)