Douro River Flowing by Peso da Régua, Portugal - aerial fly-over

douro river peso da regua portugal waterway landscape hills vineyards aerial view riverbank nature outdoors northern portugal travel tourism scenic natural beauty flowing water urban edge rural cultivation terraced viticulture wine country cloudy sky tranquility greenery town architecture regional traditional valley panoramic cultural landscape water riparian habitat serene riverside ecotourism environmental winemaking portuguese landmark destination exploration cloudy weather rural charm drone aerial