People take a lot of strange things to nature, so why not miniature water mills? There are several dozen of them along a small mountain stream with an ideal slope, and they are constantly replaced by new ones. The mini-mills are made from materials such as iron, wood, plastic, ceramic, or even electrical printed circuit boards, and some also make sounds. In Czechia, large water mills were once used to grind grain flour, while mechanical energy was obtained using large wooden wheels. Over time, they were replaced by more modern…
