30868, Murcia, Spain
Batería de Castillitos is a Military battery constructed in the 1930s in medieval castle style on a cape overlooking the sea.
The gun battery was built to prevent enemy ships entering the bay to attack the important port and military arsenal at Cartagena. You really seem to be very high above the sea at Castillitos, though the actual altitude is only about 800 feet.
This place is always open