National Geographic Megafactories: Right in the heart of Dublin, the 48 acre Guinness factory races against the clock to roast, brew, bottle and ship more than one million pints of the world�s most popular dark beer every year.
Documentary
Watch National Geographic Megafactories Season 2014 Episode 02 M4uhd for free in HD quality. Stream instantly with English subtitles — no download or account needed.