don luis i steel bridge in porto surrounded by fog and rain clouds, with people walking on top of the tram, and a bus and a

historical place atmospheric dense morning fascinating seagull dom luis douro river bridges memorable views metro porto noir oporto people walking ponte portugal subway public transportation railway bridge silhouette sky clouds tourist unesco world heritage dawn evening foggy mode transport recreation riverside shipping stay cables travel groups vessel yacht muktuk tuk bus steel structure fog mist mystical cloud bewitching don surrounded rain top tram circulating below flying over area