europe, portugal, porto, city, european city, ribeira, old town, old city, square, landmark, river, douro, douro river, bridge, ponte, ponte de dom luis, dom luis, waterfront, boat, port wine, port wine boat, sailing boats, brown, suspension bridge, white, metropolis, landmass, stream, district, city district, sailboat, urban area, craft, sailing vessel, vehicle, urban center, european country, port, rectangle