Penedès is a wine-growing region with a Spanish Denominación de Origen Protegida (DOP) (Denominació d'Origen Protegida in Catalan). Penedès PDO covers the entire Penedès region and the municipalities of four other comarques: Anoia, Alt Camp, Baix Llobregat and Tarragonès. The area is framed by the coastal hills of the Serra del Garraf and the higher inland mountains that frame the Catalan Central Depression. Long considered one of the country's best wine-growing areas after Rioja, it is also one of the oldest wine-growing areas in Europe. Perhaps better known for its cava production, a sparkling wine that has had its own designation of origin since 1986, white grape varieties predominate, although the region also produces some highly regarded red wines aged in oak.