Sherry (or "Jerez" in Spanish) is produced in the Andalusian town of Jerez de la Frontera—from which it takes its name—located in the province of Cádiz, in southern Spain. The proximity to the mouth of the river Guadalquivir results in high humidity levels, and therefore a unique climatic environment for the aging of the sherry.
The hills in the Marco de Jerez region are covered in limestone which, during hot spells, turns into an even whiter, chalkier soil (known as "albariza"), making them uniquely spectacular. The finest "albariza" soil, with its higher proportion of limestone and siliceous elements, is the best terroir to grow the grapes used to produce the best-quality sherries.