The Unfinished Fortress of Torre de Brió in Sant Miquel de Campmajor, Spain

Torre de Brió, a cultural asset of national interest in Sant Miquel de Campmajor, Spain, represents one of the last remaining examples of 'masos torre': structures built by the lower nobility or the highest peasantry. The half-point arch on the ground and first floor, though damaged, demonstrates the original construction. Two doors, one on the east side of the ground floor and the other on the south side of the first floor, each display a triangular lintel. The walls, made with quarried stones, reach up to one meter in thickness in some places. Today, the unfinished castle serves as a reminder of the region's feudal past and is a must-see for anyone interested in abandoned places or ancient relics.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons