Arribes del Duero Natural Park, Protected nature reserve in Salamanca and Zamora provinces, Spain.

Arribes del Duero Natural Park stretches across about 106,000 hectares (262,000 acres) along the Duero River, featuring deep valleys, granite cliffs, and diverse vegetation. The terrain is marked by steep hillsides that rise above the canyon-like river landscape.

Spain and Portugal signed an agreement in 1927 to divide the use of the international Duero into two sectors, which led to the reservoir network of Saltos del Duero. The steep drop of the river and its tributaries made this one of the Iberian Peninsula's areas with the greatest hydroelectric potential. Castile and León declared the Spanish side a natural park on 11 April 2002, after Portugal had protected its bank on 11 May 1998 as the Douro International Natural Park.

Local people have cultivated wine on terraced slopes for generations, and you can see old farming methods still in use across the vineyards. This traditional practice shapes how the land looks and shows how communities adapted to the steep terrain.

The protected area can be accessed from several towns, including Aldeadávila de la Ribera and Fermoselle, which serve as entry points. Guided explorations are available during warmer months and help visitors discover different parts of the park.

Five hydroelectric dams within the canyon generate power and have created artificial lakes throughout the landscape. These structures alter how water flows through the granite landscape and give the park its present-day appearance.