europe, portugal, porto, city, european city, ribeira, old town, old city, square, landmark, river, douro, douro river, waterfront, boat, port wine, port wine boat, wine, port, barrels, brown, six, water, wooden, body, yellow, metropolis, landmass, alcohol, district, city district, food, stream, craft, vehicle, beverage, european country, 6, urban center, urban area, rectangle