Riverside along the Douro River, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

douro river porto portugal riverside boats traditional colorful buildings architecture waterfront outdoor dining culture tourism landscape travel summer relaxation historical local cuisine wine riverbank fishermen scenic view vibrant leisure sightseeing markets activities nature exploration heritage picturesque cityscape events ambiance urban community food destination riverside cafes sunlight evening stroll fishing picturesque views atmosphere waterfront dining cultural experience heritage site vibrant colors holiday exploration experience