City Porto (Oporto) at Rio Douro. The old town is listed as UNESCO world heritage. Portugal. Europe

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Photo credit: © Casarolli / Alamy / Afripics
License: Licensed
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Keywords: architecture, bridge, city, cityscape, day, douro, europe, famous, historic, historical, history, landmark, oporto, porto, portugal, portuguese, river, tourism, town, traditional, travel, urban, view, water