Gayle Mill, just a few minutes' walk south of Hawes through the hamlet of Gayle, is a remarkably intact 18th-century mill that started as a cotton mill, became a sawmill, and has now been sensitively restored to function as a working watermill with an attached woodland enterprise. The building and its machinery date to around 1784, making it one of the earliest surviving cotton mills in England — a fact that surprises most visitors who associate the industrial revolution's textile machinery with Lancashire and the West Riding.
Open days allow visitors inside to see the water wheel, the line shafting, and the woodworking machines still powered by water. The surrounding hamlet of Gayle is itself worth a wander — the beck that powered the mill runs through the village past old stone cottages, and the setting is characteristic of the upper dale at its best. Check the Gayle Mill Trust website for open day schedules before visiting.