Watkins Mill in Lawson, Missouri, United States, is a preserved woolen mill dating to the mid-19th century. The mill is protected as Watkins Woolen Mill State Historic Site, which preserve its machinery and business records in addition to the building itself. It was designated a National Historic Landmark and added to the National Register of Historic Places in 1966 in recognition for its remarkable state of preservation. The historic site is the centerpiece of Watkins Mill State Park, which is managed by the Missouri Department of Natural Resources. (Ref: https://en.wikipedia.org/wiki/Watkins_Woolen_Mill_State_Park_and_State_Historic_Site)