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
Cova da Beira wine Beira. Cova da Beira produces a broad range of wines similar to those found through the Beiras wine region but is primarily known for its light bodied red wines. The principle grapes of the Cova da Beira region include Arinto, Assario Branco, Jaen, Marufo, Periquita, Perola, Rabo de Ovelha, Rufete and Tinta Amarela. Cova da Beira wine Cova da Beira is a Portuguese wine region centered on the Cova da Beira region between the Dão and Vinho Verde DOCs in the wider Beiras VR wine region. Cova da Beira was initially a separate "Indicação de Proveniencia Regulamentada" (IPR) region (and