The public are to be given a rare chance to look inside a 262-year-old corn mill in Caithness.
Organisations with links to Prince Charles have helped to organise Wednesday's open day at John O'Groats Mill at Huna.
The event is being held as part of a project looking at the potential of restoration of the building.
The Prince's Regeneration Trust believe it is the last mill in Caithness to retain working machinery.
Originally built as a threshing mill in 1750 , it was rebuilt in 1901 as a corn mill.
Between the 16th and 19th centuries, Caithness was known for its corn production and exported meal to ports across Scotland and the rest of Europe.
John O'Groats Mill was last used in 2001 and closed to the public.
North Highlands Initiative and The Prince's Regeneration Trust have organised the open day, which runs from 10:00 to 15:00.