strasbourg, medieval bridge ponts couverts. alsace, france.

alsace alsatian artificial barrage bas bridge bridges building buildings canal city cityscape colorful couverts covered dam dusk effect elsass europe european evening floodlights france heritage historical ill illuminated illumination light lighting lights mirror mirrored monument night nighttime old panorama passage patrimony petite pont ponts reflection rhin river strasbourg straaburg time tourist tower town travel twilight unesco urban vauban view water weir