Moinhos Castle
Azores, Portugal · built 1461
The Castle of Moinhos, officially known as the Castle of São Cristóvão, or Castle/Fort of São Luís is the name of the ruins of 16th-century fortification in city of Angra, on the Portuguese island of Terceira in the archipelago of the Azores. It is primarily known as the Castle of Moinhos, owing to the popular name given to the site for the number of mills that dotted the hilltop, on which the castle was erected.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).