Dunster Working Watermill Dunster Working Watermill Dunster Working Watermill (also known as Castle Mill) is a restored 18th century watermill, situated on the River Avill, close to Gallox Bridge, in the grounds of Dunster Castle in Dunster, Somerset, England. It is a Grade II* listed building. The mill stands on a site where a mill was first recorded in the Domesday Book, but the present building was constructed around 1780. It closed in 1962 but was restored in 1979 and is still used to grind flour. The equipment is powered by two overshot wheels. It is owned and run by the National Trust.
Dunster prosperity of Dunster was based on the wool trade, with profits helping to pay for the construction of the tower of the Priory Church of St George and provide other amenities. The 15th century Gallox Bridge was one of the main routes over the River Avill on the southern outskirts. The market was held in "The Shambles" however these shops were demolished in 1825 and now only the Yarn Market remains. Dunster Beach, which includes the mouth of the River Avill, is located half a mile from the village, and used to have a significant harbour, known as Dunster Haven,