Carlos Serres produces wines from Rioja, Spain's most prestigious red wine region. The winery's portfolio centers on Tempranillo-based expressions, often blended with regional varieties like Mazuelo and Graciano—grapes that bring structure and complexity to the wines of this storied appellation. The 1896 Finca El Estanque Reserva, a Tempranillo-Mazuelo-Graciano blend, represents the upper tier of the range. The Finca El Estanque Rosado Reserva offers a rosé expression built on Mazuelo and Tempranillo, while the Finca El Estanque Segundo Año showcases Tempranillo with Graciano in a younger, more approachable style. These wines have been assessed by major critics including Decanter, Wine Spectator, Wine Advocate, Wine Enthusiast, and Falstaff, reflecting their standing within the broader Rioja market.