Duero River

The Duero River, also known as the Douro River, is a major waterway in the Iberian Peninsula that flows from Spain into Portugal, eventually reaching the Atlantic Ocean. It stretches approximately 897 kilometers (557 miles), playing a crucial role in transportation, agriculture, and wine production—particularly famous for the port wine region in northern Portugal. The river's basin supports diverse ecosystems and communities, serving as a vital resource for both countries. Its scenic valley is also known for beautiful landscapes, historical sites, and cultural significance, making it an important natural and economic feature in the region.