The Poldermolen is an historic polder mill in the town of Geldermalsen. It was built in 1772, but little about the history of the mill is known. The mill was bought by the Gelders River Mill Foundation in 1974, and major restoration work was performed in the 1980s. The is now in working order, and occupied by a volunteer miller. The mill is not normally open to the public, however tours can be arranged by appointment.