Buchanan Castle sits on the outskirts of the village of Drymen, Stirlingshire, Scotland. It was built in the 1850s for the 4th Duke of Montrose as a family home, serving as such until 1925. The roof of the building was removed in 1954 and the condition of the Castle has since deteriorated. It was used as a hospital during the 2nd World War, and included patients such as Rudolf Hess, who was brought here after his flight to Scotland in 1941.