Heron Corn Mill is located on the banks of the River Bela in Beetham, South Cumbria, close to the Lancashire border. It occupies the west bank of the river immediately below Beetham waterfalls.

Heron Corn Mill is a Grade II* listed building, the listed structure comprising the attached mill race (launder), attached grain kiln/dryer and internal machinery. It includes a rare survival of a Lowder frame that is associated with the machinery. The mill's associated structures, are of national significance, as a relatively intact, operational, 18th century corn mill that continues the use of the site as a water mill, a use that has been ongoing in the area for over 900 years. The existing structure of the Heron Corn Mill dates primarily back before the middle of the 18th century, and was essentially constructed in a single phase. The mill retains rare engineering features, such as the lowder frame, that is integral with the building, and milling has been documented on, or near the site, since at least the 13th century and it is likely that the mill has been constructed on the site of much earlier mills.

The mill passed through many hands, with the longest association being with the Dallam Estate, until 1927, when it came into the hands of W & J Pye millers of Lancaster. From about 1955-58, they rationalised their business and closed the mill and for the next two decades the mill was left unused. In 1973, Henry Cooke Ltd., leased the mill to the newly-formed Beetham Trust, to restore and open the mill to the public. In 1975 the mill was opened by Princess Alexandra, and has continued to demonstrate the engineering of a water driven corn mill to the public. Henry Cooke Ltd was later taken over by Billerud Beetham Ltd, the current owners of the freehold and from whom the trust have a 99 year lease on the site and buildings.

Heron Corn Mill is open to the public Wednesday to Sunday, 11am to 4pm. A guide booklet is available for purchase which explains the history and use of the site throughout is life. Guided tours for groups can also be arrange, please phone 015395 64271 for more information.