A very good photo.
Exposure, colour and contrast look nice.
The subject is really interesting. It's a shame the tree is taller than the tower as that and it's position tends to draw the eye. Considering that I think it might be good to have framed the shot with the top of the tree included. Also include a bit more on the left side, this would depend on what is to the left of course, there may be something there you didn't want in the shot.
Thanks a lot. You are right, as usual. On the left in the original photo only appears a wall of stones of another building, I thought it was not interesting. About the tree I will try next time and may be I shot the photo from the right, another perspective.Ana