View of waterfront, Douro River and Dom Luis I Bridge, UNESCO World Heritage Site, at dusk, Porto, Norte, Portugal, Europe

photography panoramic color image travel destinations travel outdoors sunset dusk incidental people unesco world heritage site portugal europe dom luis i bridge bridge architecture boat douro river river water city urban scene porto norte light illuminated cloud sky reflection horizontal travel destination tourist destination tourist destinations sundown evening twilight rivers flowing water outdoor outside cities urban bridges connection connections architectural