Sherry barrels. Barrels stacked in a 'criadera' and 'solera' site for the production of sherry. Sherry is a fortified wine made from grapes grown in and around Jerez de la Frontera, Spain. The fortified wine is stored in oak casks and aged in the solera system. Over a period of at least three years, the wine is gradually moved between a series of barrels until it is ready to be bottled. Photographed in the Tradicion bodega, Jerez, Spain.