europe, portugal, porto, city, european city, ribeira, old town, old city, square, landmark, river, douro, douro river, body, trees, houses, water, high, angle, building, plant, landmass, dwelling, stream, district, house, housing, tree, metropolis, port, woody plant, european country, urban center, urban area, rectangle
the old town on the Douro River in Ribeira in the city centre of Porto in Porugal in Europe.