Folly Mill Tidenham · Gloucestershire · England

Folly Mill is the name used in specialist mill records for a tower corn mill at Tidenham. The surviving structure is a masonry tower or tower remnant within the landscape above the River Wye. The site has also been associated with local traditions of a lookout tower and later folly, reflecting its prominent position and the later picturesque character of the Piercefield and Wye Valley landscape.

The windmill record identifies the site as a tower mill with a corn-milling function. Separate local accounts describe the remains as a stone ruin on the hillside, thought to have been a lookout tower or windmill in earlier use. The nearby Piercefield estate developed as a celebrated eighteenth-century picturesque landscape, and material connected with Grove House and its tower has been interpreted through archaeological and local historical work as possibly involving a windmill later converted or adapted as a summerhouse or estate feature.

The surviving site does not retain a complete working windmill form. The cap, sails, windshaft, stones, and internal machinery have gone, and the visible evidence is the remaining masonry tower. Its value for the windmill record lies in the survival of a named tower-mill site within the Tidenham landscape, where later estate use and local tradition have overlaid the earlier wind-powered identity.