Where it is
The Douro valley runs east from near Porto to the Spanish border, in northern Portugal. It has three subregions: Baixo Corgo, Cima Corgo and Douro Superior, which become progressively hotter and drier upriver. The Alto Douro wine region is a UNESCO World Heritage cultural landscape.
History
The Douro was demarcated in 1756, among the first regulated wine regions in the world. Port was shipped from Vila Nova de Gaia, opposite Porto, where the lodges still age it.
Grapes and wines
More than a hundred grape varieties are permitted. Touriga Nacional, Touriga Franca, Tinta Roriz (Tempranillo), Tinta Barroca and Tinto Cão are the main red grapes. Port is a fortified wine made by stopping fermentation with grape spirit, in styles including Ruby, Tawny and Vintage. The Douro DOC covers the dry table wines.