europe, portugal, porto, city, european city, ribeira, park, castle, fort, castelo, architecture, ruin, ruins, historic, castelo sao francisco xavier, sao francisco xavier, facing, cannon, water, body, dwelling, palace, facility, unsoundness, house, artillery, mansion, port, devastation, landmass, district, decay, european country, military installation, metropolis, armament, historical, urban area, weaponry, urban center, building, military post, deterioration, garrison, housing