Alberto, Paolo thanks for the comments! I see you crop variant. But. I don't know. I like an air, open space in the panorama. Your crop look more finished, composition is better then original, but open space is collapsed.
I'll print both variant and compare it from a paper.
I find the PS work very well done, and the sky and reflections very dramatic. Also, the tree framing the scene is fine. Nevertheless, I would like to have an interest point (the boy?) at the right side, otherwise there is too much wasted space there.
On the other side, try a cropping, I dare to suggest you a square format.
0 
![In the lost city [3]](http://thumbs.imageopolis.com/images/4/2/3/5/4235/1084306-Micro.jpg "In the lost city [3]")
