the viewpoint over the river

terrain mountain cliff coast sea hill rock geology landscape reservoir landmark tower plateau vacation cape ridge horizon bay viewpoint river tua-river nature sky ujo-viewpoint structure metal architecture construction rust travel são-mamede ribatua safres alijó alto-douro trás-os-montes north-region village real tua valley regional natural park tua-valley-regional-natural-park douro mountains bridge walk monument blue tour tourism tourist stroll photography portugal são-mamede-de-ribatua ujo iron attraction hills leisure view over background part left são mamede trás montes