Ponte Dom Luis I Bridge and Douro River, UNESCO World Heritage Site, Porto, Porto District, Norte, Portugal, Europe

travel destinations travel horizontal color image outdoors sunset dusk no people porto norte porto district portugal europe high angle view copy space cloud sky ponte dom luis i bridge bridge douro river river water unesco unesco world heritage site city urban scene building architecture fog ethereal travel destination tourist destination tourist destinations sundown evening twilight rivers flowing water outdoor outside nobody no one no person cities urban buildings bridges connection connections architectural