When I started with black-and-white rehearsals, I did not have a clear idea of what I wanted. When I found this almost merging between the sky and the castle walls ... I liked it. And so it was. After your comments I tried to increase the contrast between the walls and the sky a bit. I also liked it but it got a more classic image. I thank you for your comments and criticisms. It was a good time to learn.
Here's the castle viewed from a wider perspective. I also leave the address of the site in English <Castelo de Almourol>. Enjoy and dont forget to visit us.