Ah, nothing is quite as refreshing as a nice, cold beer. And the best way to learn about beer is to visit the source: the brewery. The folks at TripAdvisor have put together a list of the best tours out there. So drink up! #1 -- Anheuser Busch Brewery Tour, Saint Louis, Mo.: In addition to offering free tours that take in the legendary Budweiser Clydesdale Stable, Beechwood Lager Cellars and historic Brew House, true hop-enthusiasts can also opt for the more exclusive "Beermaster Tour." Courtesy TripAdvisor