Spanish wine is produced in various regions across Spain, each known for its unique grape varieties and winemaking traditions. The most famous wine regions include Rioja, Ribera del Duero, and Priorat, where both red and white wines are crafted. Tempranillo is the most widely planted grape, often used in red wines, while Albariño is popular for whites. The country has a rich history of winemaking, dating back thousands of years. Spanish wine is often categorized by its aging process, with terms like Crianza, Reserva, and Gran Reserva indicating the length of time the wine has been aged in barrels and bottles.