Port wine be labelled as "port" or "Porto". In the United States, wines labelled "port" may come from anywhere in the world, while the names "Oporto", "Porto", and "Vinho do Porto" have been recognized as foreign, non-generic names for port wines originating in Portugal. Port is produced from grapes grown and processed in the demarcated Douro region. The wine produced is then fortified by the addition of a neutral grape spirit known as aguardente in order to stop the fermentation, leaving residual sugar in the wine, and to boost the alcohol content. The fortification spirit is sometimes referred to as brandy but
Galician wine grapes produce crisp, aromatic white wines. The area's red wine production is centered on the Garnacha Tintorera which produces dark colored but light bodied wines. Due to the similar climates and Atlantic influence, many of the wines of Ribeiro often share a style with the Portuguese wines from the nearby Vinho Verde region though wine expert Tom Stevenson notes that Ribeiro wines are often fruitier and more aromatic. Other grapes grown in the Ribeiro region include Albariño, Brancellao, Caiño tinto, Caiño blanca, Ferrón, Garnacha, Godello, Jerez, Loureira, Mencía, Sousón Tempranillo, Torronté, Treixadura and Viura. The Valdeorras DO is the easternmost