Monterrey Castle
Monterrei, Spain
The Castle of Monterrey is a 15th-century castle at Monterrei, in Ourense, Galicia. It is located at what was then a strategic point on the frontier between the kingdoms of Galicia and Portugal. It is now a hotel, part of the network of Paradores de Turismo de España.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).