Anheuser-Busch's
headquarters are located in
St. Louis.
Tours are available of the
brewery and grounds, including the stables of the famous
Budweiser Clydesdales. Best of all, the tours are
FREE AND at the end there's free
beer tasting.
Cameras are allowed, except in a few production areas. There's also a rather large gift shop.
The actual location's a bit out of the way (several miles from the Gateway Arch), so get directions beforehand. There's a bus that runs nearby, but otherwise a car would be a good idea. (Personally, I was stupid and listened to someone downtown who told me "oh, it's about a mile from here" ...about 4 miles later, my legs hurt...)