Castillo de Fuste
Antigua, Spain
Castillo de San Buenaventura is a defense tower located in Caleta de Fuste, a small town on the island of Fuerteventura, Canary Islands, Spain. It is also known as "Castillo de Caleta de Fuste", and the tower was recognized as historic-artistic monument in 1949.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).