Simply put, Port comes from Portugal. The grapes are grown and the Port is vinified in the demarcated Douro Valley Region. It is one of the oldest demarcated wine regions in the world. The original boundaries were established in 1756 and they’ve been revised on several occasions since. The Douro River is in the northern part of Portugal and spans from the Atlantic Ocean (near Oporto) eastward 120 miles to Spain, where it continues as the Ribera del Duero for another 240 miles. The Port growing area, known as the Alto Douro region, begins about 60 miles east of Oporto and continues right to the Spanish border.