The D’Onvermoeide mill is a working corn mill located in the Hoevendijk park in the town of Raamsdonkveer. The mill was built in 1890 by W. A. Martens of Waspik. The D’Onvermoeide mill is now owned by the Geertruindenberg County, and can be seen in operation on a regular basis. The corn mill is open to the public every first and third Friday of the month, and tours are available on other days by appointment.