europe, portugal, porto, city, european city, ribeira, old town, old city, square, landmark, river, douro, douro river, transport, ship, boat, tour, boat tour, people, water, ferryboat, filled, body, daytime, white, lot, stream, daylight, port, landmass, district, travel, pile, vehicle, european country, rectangle, metropolis, transportation, urban area, journey, urban center, heap, day, batch, craft, mass, ferry
a boat on the Douro River in Ribeira in the city centre of Porto in Porugal in Europe.