Spain’s largest autonomía, Castilla y León, is steeped in history and diverse landscapes. Known as “the land of castles,” it played a key role in shaping the Kingdom of Spain. The region’s continental climate, arid central plateau, and encircling mountains create ideal conditions for renowned DOs like Ribera del Duero, Rueda, Toro, and Bierzo. With the Duero River winding through its heart, Castilla y León is a cornerstone of Spanish winemaking.