The Kaager mill is an 18th century polder mill located on Balgery 2 in the town of Kaag. The exact age of the mill is unknown, but it is believed to have been built in the first half of the 18th century. The mill originally served the 100 hectare Kaagerpolder. The mill was decommissioned in 1965 so that restoration work could be carried out. Today, the mill is owned by the Rhineland Mill Foundation. The Kaager Mill is open to the public.