The castle stands on a rock accessible only over the footbridge - a very strong defensive position indeed. Accommodation there became cramped and additional buildings were added on the nearby cliffs. This is the old part of the castle seen through a window in the west range.
The road shown by Par Andersson is not in the grid C9041. The nearest the road runs to the coast is well over 100mts away, but your picture shows it on the edge !!!!