Look at it from the beach
Go out to the beach and look back to see the whole compound on the hill. I guess you'd get an even better view from the sea but I didn't (I was there only for an afternoon's trip).
If you have more time you can spend some time on the beach swimming below the castle.
Oh, by the way, this is the beach that El Cid (starred by Charlton Heston) died on in the movie.