Foto de stock - Dom Luis I bridge crossing the Douro river and linking Vila Nova de Gaia, and Porto, both in Porto District, Portugal. The boats which once transported port wine on the river and are now used for excursions are called barcos rabelos. The historic centre of the city is a UNESCO World Heritage Site.

Imagen: Dom Luis I bridge crossing the Douro river and linking Vila Nova de Gaia, and Porto, both in Porto District, Portugal. The boats which once transported port.

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