The vineyards of Arenales de San Gregorio Nature · Arenales de San Gregorio, La Mancha, Ciudad Real Image of Arenales de San Gregorio, not of the place itself. The municipal area of Arenales de San Gregorio is almost entirely covered by vineyards protected under the La Mancha Denomination of Origin, dotted with olive groves grown for olives and oil, cereals -mainly wheat and barley- and melon fields. The municipality's economy rests basically on this primary sector, complemented by a wine cooperative, itself integrated into the La Mancha Denomination of Origin, which processes the local grapes. Photo: Thor8 (CC BY-SA 3.0) What to see and do in Arenales de San Gregorio