Night view of Dom Luis I Bridge over Douro River with Vila Nova de Gaia with traditional buildings in the background, Porto, Portugal, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside night background people incidental people people in the background travel travel destination travel destinations city cities douro river dom luis i bridge vila nova de gaia quayside waterfront porto portugal portuguese europe european building exterior building buildings architecture architectural urban scene urban scenes urban river water landmark landmarks famous well known well known bridge diminishing perspective vanishing point perspective elevated view high angle view high angle cityscape arch arches arched metal bridge history historical historic heritage 19th century illuminated lit lit up reflection reflecting reflected