I like the balance you have struck with this photo Pedro. The light radiates from the horizon and the photo is nicely and gently vignetted. My eye is drawn down the rock wall before seeking out the contrails in the sky. I think con trails have been sent to help photographers who know how to compose them with a photo. There are nice vectors of cloud traveling left to right across the sky and vectors below the surface of the water also point toward the perspective point near the center of the photo.If I was to tinker I might raise the levels in the sky and even doge the contrails a little whiter but I like the duotone colour combination you have used.

This photo conveys an amazing atmosphere. The soft, muted colours are beautiful themselves and together with the long shutter effect give the photo a great sense of calmness and tranquility. This is contrasted by the rocky wall which not only divides the soft water and gives a great focal point towards the horizon but also provides contrast by its texture.
Additional friction is created by the contrails in the sky pointing in the opposite direction.
Overall this is a very beautiful, well balanced photo with a great use of lines and soft versus hard elements leading the eye from one part to another yet keeping the whole image together.