Calvados is an apple brandy from the French région of Lower Normandy.
The fruit is picked and pressed into a juice that is fermented into a dry cider. It is then distilled into eau de vie. After two years aging in oak casks, it can be sold as Calvados. The longer it is aged, the smoother the drink becomes. Usually the maturation goes on for several years. A half-bottle of twenty-year-old Calvados can easily command the same price as a normal-sized bottle of ten-year-old Calvados.