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, sailboats, body, calm, water, three, metropolis, landmass, alcohol, district, city district, food, sailboat, urban area, 3, craft, sailing vessel, vehicle, urban center, european country, stream, rectangle, beverage