The Grebmolen is a working polder mill located on Molenweg in the town of Schoorldam. It was built in 1875 to serve the Geesmerambacht polder. The mill was decommissioned in 1969, when the Geestmerambacht polder was merged with some other local polders, and a newer mill took over its duties. In 1972, the mill was put back into active service. Today, the mill can regularly be seen in operation, and tours are available by appointment.
