Andechs Monastery is one of the most beautiful spots on earth to be brewing. And they have been there since 1455!! On the top of a hill, west of the big city of Munich, out in the countryside (almost).
They have a great cavernous beer hall. Plenty of outdoor seating. A great giftshop with incredible prices. Fish and pork aplenty and many excellent beer choices depending upon the season. Their darker beers go excellent with the pretzels and pork.
Spezial Hell and Dunkle Weissbeer being my favorites.