The people live in mud thatched houses with grass roofs. It can get pretty cold in the mountains, so there must be fires in each house. The animals lived in attached stables. Idyllic country life the way it has been for thousands and thousands of years. These are water powered grinding mills that work on a see-saw principle.
Water flows into a bucket on the end of a beam.
When filled, the beam tips and empties. When empty, the beam tips back and on the end there is a block of wood which bangs down and crushes grain. Everything is made from wood and lashing. I didn't see any metal parts and probably not even nails were used in the apparatus. A small troop of young girls came out of the mountains, each carrying large baskets of firewood.