Originally opened with the name, 'Blue Mill' on June 25th, 1929, this unique building and business went through several owners and changes over the years.  It was built in the shape of a small Dutch windmill with sails on the front.  It had blue trim and the turning sails were fitted with decorative lights.

In the 1940s, the current owners obtained, at no cost, an old Army barracks from Fort Ellis in Illinois, which served as a detention camp for World War II prisoners of war. The barracks was moved to Lincoln and attached to the back of the restaurant. They painted the building barn red, and it became known simply as, "The Mill."

The Mill became famous for its fried schnitzel, which was originally made of veal.

By the mid-1980s, The Mill had lost most of its Dutch-themed interior. A small museum of strange objects and artifacts became was located in the business to attract customers.

In 1996, The Mill closed. The structure deteriorated for the years and became a source of concern about being unsafe. In 2005, The Mill was sold for the taxes, but the new owner could not afford to demolish it due to costs and regulations. In 2006, the Route 66 Heritage Foundation of Logan County was formed. The Foundation worked with the owner to save The Mill from being demolished.

On April 29, 2017, The Mill is open again as The Mill on 66 Museum! It contains memorabilia from lost Route 66 attractions and businesses from Logan County. It also has a Route 66 gift shop.