europe, portugal, porto, city, european city, ribeira, old town, old city, square, landmark, river, douro, douro river, transport, ship, boat, tour, boat tour, sailing, sailboat, blue, white, daytime, sea, metropolis, landmass, transportation, stream, district, journey, urban area, port, daylight, craft, sailing vessel, seafaring, vehicle, urban center, european country, employment, day, rectangle, travel
a boat on the Douro River in Ribeira in the city centre of Porto in Porugal in Europe.