Ribeiro DO is a wine designation from the Dão region in Portugal. It is known for producing high-quality red and white wines, primarily from indigenous grape varieties. The region's unique climate and diverse soils contribute to the distinct flavors and aromas found in these wines. The red wines of Ribeiro DO are often made from grapes like Touriga Nacional and Jaen, while the whites typically feature Encruzado and Malvasia Fina. These wines are appreciated for their balance, elegance, and aging potential, making them popular among wine enthusiasts both locally and internationally.