Port

Port, or to give it its full name 'vinho do porto', is a Portuguese wine from the area known as the Upper Douro which starts 45 miles from the coast at the town of Oporto and stretches east to the Spanish border. Wine is fortified with grape brandy, which stops fermentation before it is complete by raising the alcoholic strength beyond that at which the yeasts can survive. This produces wines with residual sugars, giving Port its inherently sweet style.