The Castle of Aulencia, a 15th-century fortress near Madrid

The Castle of Aulencia, located in Villanueva de la Cañada, Spain, is a notable example of a late medieval hill castle. The castle stands prominently on a strategic hill, where the Aulencia river converges with the Guadarrama river, offering sweeping views of the surrounding landscape. The castle's history in the sources begins in the 15th century as it was under the ownership of Garcia Fernández; it could have an Islamic origin but that is not explicitly stated in the documents.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons