The Karlstrup Windmill (Danish: Karlstrup Stubmølle) is a post mill in the Sorgenfri neighborhood of Kongens Lyngby in Denmark.

The windmill then power a millstone to produce flour.

The windmill primarily produced flour but was modified in 1798 to also peel barley.

[2][3] In 1921, the windmill was acquired by the Frilandsmuseet and moved to the open-air museum's grounds a year later.

[4] In 2011, the Karlstrup Windmill appeared on the eighth episode of The Amazing Race 19.