Santa Barbara Castle has everything you would expect, cannons, a palace, dungeons, a moat, the ruins of a small church and of course that famous lookout tower. From all around the walls you get the most fantastic views: a definite photo opportunity. And when you're tired of walking up and down steep paths, peering over cliff edges and pondering the places from where boiling oil was thrown, there are two café areas where you can take a break in the shade of pine trees.
The castle is free to visit and there are two entrance points. If you're feeling energetic you can walk along the road that winds around the back of the mountain, or if you're short of time you can drive. The easier way, incurring a small charge (but free if you are disabled or an EU senior citizen) is via an elevator going up through a tunnel carved out of the rock. You find the entrance opposite the Postiguet beach area.