In what location are barrels specifically constructed for aging spirits?

The correct answer is cooperage, as this is the specific location where barrels are constructed for aging spirits. A cooperage is a facility dedicated to the craft of making barrels, which are essential for the aging process of various spirits, including whiskey and bourbon. The term 'cooperage' is derived from the profession of coopering, which is the art of making barrels.

While breweries, wineries, and distilleries are all facilities related to the production of alcoholic beverages, they do not focus on the construction of barrels themselves. Breweries produce beer, wineries make wine, and distilleries create spirits. However, the barrels used in these processes are often sourced from cooperages. This distinction underscores the importance of cooperages in the aging process, as the quality and characteristics of the barrel greatly influence the final taste and profile of the aged spirits.