Forte da Greta
Azores, Portugal
The Fort of Greta (Forte da Greta) is a fort along the promontory of Santa Catarina, on the western edge of the Bay of Mós, in the civil parish of Vila de São Sebastião, in the municipality of Angra do Heroísmo, on the Portuguese archipelago of the Azores.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).