If you ever visit the north of Spain, one of the must-see places is the Loarre's castle, in Huesca. It is a XIIth Century fortress in the top of a hill, extremely well preserved, and the view is simply breathtaking.
I am saying this because lately there have been several plans to use the place as a setting for movies. In the late 90's, when there was still a possibility of Paul Verhoeven making "The Crusades", Arnold Schwarzenegger visited the castle.
These days, the news seem to give for granted that the castle will be used as a location for the upcoming Ridley Scott / Orlando Bloom film called "Kingdom of Heaven". Filming is suppossed to start in January, and apparently the crew has already been working on the castle.
You can see pictures of Loarre's castle in its own webpage:
http://www.castillodeloarre.com/