Port wine (also known as Vinho o Porto, Oporto, Porto, and often simply Port) is a Portuguese, fortified wine from the Douro Valley in the northern provinces of Portugal. It's typically a sweet wine, but comes as dry or semi-dry too. It is often served as a dessert wine. Wines in the style of the Portuguese product called port are produced around the world in several countries—most notably Australia, South Africa, India, Canada and the United States. However, under European Union guidelines, only the product from Portugal may be labelled as Port. In the United States, Federal law mandates that the Portuguese-made product be labeled Porto or Vinho do Porto.