Out of all the tile improvements. I rarely build these two. The extra hammers from the workshop is nice, but put it on the grassland and you only get 1 food, and zero food on a plain. I try to make a city gather as much food as possible. More citzens equals more income, more specialists and thus more great people, and an extra citzen to work the mines to get almost the same hammers as if they were working a workshop anyway. Now, the watermill... most if not all my grassland tiles by a river has cottages on them. Seems the only time where a watermill is sometimes useful is on a plain beside a river, that doesn't have a cottage or a farm on it. I would just like to hear some opinions on these two improvements, as I rarely build them, but perhaps I should build more of them in certain instances, not sure.