Johnstone Castle, Johnstone Castle Camp, German Working Camp No. 188

Scotland's National Record of the Historic Environment records Johnstone Castle, Johnstone Castle Camp, German Working Camp No. 188 as Prisoner of War Camp (20th Century). The official map says its point is accurate as follows: NGR given to the nearest 10m. The record does not by itself mean that the public may enter the place.

Johnstone Castle was originally a medieval stronghold, later repurposed as German Working Camp No. 188 during World War II, where captured German prisoners of war were used for labor. The site is historically significant as part of Scotland's network of WWII POW camps, reflecting the country's role in managing and utilizing enemy prisoners during the war.