Torre de San Martín de Hoyos

Torre de San Martín de Hoyos is a medieval castle located in Valdeolea, Spain, built in the Lower Middle Ages (14th century). Its initial purpose was as a defensive tower and watchtower, guarding against potential invaders. It also served as a symbol of seigneurship, and a toll booth for trade taxes in Cantabria. The tower's strategic location is on a hill, providing clear views of the surrounding landscape. The four facades of the tower are nearly blind, with only one hole per facade, except for the Eastern and Western facades which have additional features.

The Eastern facade has an arched entrance in the center and a third-floor spyhole, while the Western facade has a large arched opening in the second floor and a three-pane window on the third floor, with possible original support for a battlement or machicolation. The tower was listed as endangered on the Red List of endangered heritage by the association Hispania Nostra in 2006. The foundation Santa María la Real, with the support of Caja Madrid, carried out conservation work on the building. Torre de San Martín de Hoyos is listed as endangered heritage by Hispania Nostra.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons