Which Spanish region is known for producing outstanding quality wines made from Tempranillo?

Rioja DOCa is indeed famous for producing exceptional wines made from Tempranillo, particularly noted for its balance, aging potential, and complexity. This region is historically significant in Spain's wine production and is recognized for crafting wines that showcase the character of the Tempranillo grape, often combined with other varietals such as Garnacha and Graciano.

Ribera del Duero DO is also known for producing high-quality Tempranillo wines, often referred to locally as Tinto Fino or Tinta del País, which thrive in the region's unique terroir. The rigorous conditions lead to intense flavors and great aging capabilities, solidifying Ribera del Duero's reputation for premium Tempranillo wines.

Rueda DO specializes mainly in white wines, particularly Verdejo, and is not primarily known for Tempranillo. Penedès DO is known for a variety of grape varietals, including Cava (sparkling wine) made from Macabeo, Xarel-lo, and Parellada, and while it does produce some still red wines, Tempranillo is not the focus here.

Overall, both Rioja DOCa and Ribera del Duero DO excel with Tempranillo, but