Dunster Working Watermill sits below Dunster Castle, where the River Avill still drives a restored mill in a village already rich with medieval and estate history. The pleasure is in the machinery: belts, stones, waterwheel, and the steady rhythm of grain being turned into flour.
It is a small sight, but a satisfying one if you are already in Dunster from Minehead or Exmoor. Combine it with the castle, yarn market, and village lanes rather than making a separate trip only for the mill.