I mentioned elsewhere that I once had a trip around an Italian bakery - I was wondering about other pleasant factory tours that people might have experienced.
I've seen, among other things, the inside of a lot of "booze generating" places, an olive oil factory in Cyprus, two English biscuit factories and a Hovis bakery.
I had one tour I hated - a battery chicken farm owned by a schoolfriend's father - hey, he didn't like it either, when he took over the farm they went free range!
So - where have you been, what have you seen?