Czech Republic
The factory for the world famous beer is in Pilsen, Czech Republic and they do a fantastic tour - at the start of which they give you a glass and you fill it up so you have beer to take around the factory with you.
They take you and show you the old barrel cellars and the traditional brewing methods while you are drinking and from there onwards you can explore various other parts of the Factory campus which has a modern visitors centre where you can learn even more and wander round yourself after the guided tour. Good stuff. Lots of different language tours.
We then went for lunch at the great Pilsner restaurant - with a beer obviously - though you can choose to sit outside and eat, or just skip the eating bit and have a beer at the bar.
We stayed after that and had a game of giant chess (the pawns are beer bottles - of course) before getting a wee cheeky souveneir and heading back to the train station.
In Plzen, Czech Republic. We got a train from Prague central railway station - takes an hour or maybe two - and made a day trip of it. The lady at the station information didnt speak much English - but when we said "Pilsner" she knew exactly what we were after, gave us a map and directed us. Its a few minutes (5) walk from the station.