europe, portugal, porto, city, european city, ribeira, old town, old city, square, landmark, river, douro, douro river, evening, sunset, lighted, photography, aerial, metropolis, landmass, stream, district, urban area, aeriform, port, urban center, sundown, ethereal, european country, day, rectangle
the Douro River in Ribeira in the city centre of Porto in Porugal in Europe.