People sitting on the riverside of Gaia looking at the river and to Porto with Dom Luís I Bridge on the background

dom luis i bridge river gaia people water transport port wine boats happy sunny enjoying observing unesco historic european urban blue vila nova de gaia riverbank outdoor destination landscape douro river tourist panorama outdoors tradition scene town famous attraction view landmark historical city tourism cityscape cais de gaia architecture bridge travel oporto portuguese portugal porto europe old douro wide