Porto with bridge Ponte Dom Luis I over river Douro night evening travel city in Porto, Portugal, Europe

arch bridges arch bridge architecture atmosphere atmospheric light atmospheric at night blue hour bridges bridge buildings building catedral cathedrals cathedral churches church cities city center city centre city portrait cityscape city scape city view city constructions construction cultural monuments cultural monument cultural sites cultural site darkness deserted dim douro river douro downtown duero dusky dusk empty europe evening atmospheres evening atmosphere evening light evening mood evening skies evening sky evenings evening famous place gustave eiffel heritages heritage historical historic center historic centre historic city center historic city centre historic old town historic holidays holiday time holiday inner city inner town in the evening journey light atmosphere light mood local view midtown mood night photograph night picture night shot night nobody no one no people northern portugal old quarter old towns old town ol overviews overview place of interest ponte dom luis i bridge ponte dom luis i ponte porto portugal portuguese religious building rio douro river rio douro rivers river sacral building sacred building sights sight skylines skyline southern europe south europe steel buildings steel building tourism tourist attractions tourist attraction town center town centre townscapes townscape town view town traveling travel photography travel trip twilight unesco world heritage sites unesco world heritage site unesco world heritage unesco uninhabited vacation time vacation view of the city village world heritage site