Castilla y Leon, located in the northwest of Spain, is one of the nation’s most important winemaking regions. There are nine denominacions de origen (DOs) located in Castilla y Leon, including Rueda, Toro and Ribera del Duero. Viticulture has been an important part of the local economy for nearly 2,000 years, with wine production in the region even pre-dating the arrival of the Romans.