As I mentioned in this post, on our second day in St Louis, we took a free tour of the Anheuser-Busch brewery. With all of the times we've visited St. Louis, we've never been, so this trip, we made it happen.
If you are ever in St. Louis, and have an hour or two, I highly recommend the free tour. There are other tours available (you just have to pay for those). Even if you aren't a big Budweiser fan, there is so much history to be found on this campus. It's so fascinating. Plus, like I mentioned before, it smells amazing there. And the Clydesdales are adorable.