Barolo is a red Denominazione di Origine Controllata e Garantita (DOCG) wine produced in the northern Italian region of Piedmont. It is made from the Nebbiolo grape and is often described as one of Italy's greatest wines. The zone of production extends into the communes of Barolo, Castiglione Falletto, Serralunga d'Alba and parts of the communes of Cherasco, Diano d'Alba, Grinzane Cavour, La Morra, Monforte d'Alba, Novello, Roddi, Verduno, all in the province of Cuneo, south-west of Alba. Only vineyards planted in primarily calcareous-clay soils in the hills with suitable slopes and orientations are considered suitable for Barolo production. Barolo is often described as having the aromas of tar and roses, and the wines are noted for their ability to age and usually take on a rust red tinge as they mature. When subjected to aging of at least five years before release, the wine can be labeled a Riserva.