Rioja is a renowned wine region in northern Spain, famous for its high-quality red wines primarily made from the Tempranillo grape. The region's unique climate, characterized by a mix of Mediterranean and continental influences, contributes to the rich flavors and aromas found in its wines. Rioja wines are often aged in oak barrels, which adds complexity and depth. The Rioja designation is divided into three categories: Rioja, Rioja Crianza, and Rioja Reserva, each indicating different aging requirements. The wines are celebrated for their balance, with notes of dark fruit, vanilla, and spice. Rioja has gained international acclaim, making it a staple in wine collections worldwide.