Port wine is a fortified wine that originates from the Douro Valley in Portugal. It is made by adding grape spirits to the wine during fermentation, which stops the fermentation process and preserves the natural sugars. This results in a sweet, rich flavor profile, often with notes of dark fruits, chocolate, and spices. There are several styles of Port wine, including Ruby, Tawny, and Vintage. Each style varies in taste, aging process, and complexity. Ruby Port is young and fruity, while Tawny Port is aged in wooden barrels, giving it a nutty flavor. Vintage Port is made from the best grapes in exceptional years and is known for its aging potential.