The Douro River embodies Portugal's natural and cultural wealth. In all, this river, from its source in Spain, stretches over 557 miles to its mouth at the Atlantic Ocean, on the coast in Porto. It has shaped every landscape, tradition, and economy in northern Portugal. It flows in an uphill, stretching course through the UNESCO-listed Douro Valley, winding through terraced vineyards, lovely towns, and scenic historical landmarks that tell the story of decades of human creati