The Douro Valley is renowned for Port wine, a fortified wine made by stopping fermentation and adding grape spirits, but it also produces high-quality dry table wines. The grape varieties most closely associated with both Port and Douro table wines are Touriga Nacional, Touriga Franca, Tinta Barroca, and Tinta Roriz. Touriga Nacional is the standout for its deep color, structure, and intense aromas, forming the backbone of many blends. Touriga Franca contributes vibrant perfume and smoothness, Tinta Barroca adds body and richness, and Tinta Roriz (Tempranillo) brings bright acidity and finesse. Together, these varieties define the characteristic style of Douro blends. Riesling is not typical for the Douro, which is more rooted in these indigenous varieties and their blends.