The Region of Castilla La Mancha is known as the most extensive vineyard in the world, with more than 500,000 hectares (1.235.526 acres) dedicated to the vine, approximately half of the surface dedicated to vine growing in Spain. The vineyards of Castilla La Mancha are to be found on a great plateau of loose and healthy soil composed of a combination of clay and limestone, with a clear wine-growing vocation. The versatility of the land of Castilla La Mancha, plenty of sunshine, and high temperatures enable to the introduction of a vast variety of grapes from around the world, complementing the native grapes Airen and Tempranillo. Near 20 million hectoliters (528,344.102 US gallons) are produced on an annual basis, generating 38,000 jobs and involving 112,000 farmers. With 49 varieties cultivated, Castilla la Mancha has 9 Appellations of Origin (D.O) and 12 Wines of Pago (state wines).