The Douro Valley is located in the North of Portugal and runs from the city of Porto in the west, all the way across to the Spanish border in the east. Douro inherits it's name from the Douro River, which snakes through the valley, the region is famed for it's production of Port Fortified Wines and yet despite this Douro produces just as many table wines as it does fortified.
While the grapes responsible for the table wines are typically grown on the region's more granite based soils, those reserved for the creation of Port will likely be found in Schist. The Douro Valley produces far more red wines than white with the styles diverse, ranging from light, fruitier reds to bold, complex wines often compared to those of Bordeaux.
Douro has Portugal's highest wine classification as a Denominação de Origem Controlada (DOC).