The Antonymolen is a historic polder mill in the town of Maasdam. It was built in 1749 to replace an older mill that had been serving the polder since 1637. The mill was built by master carpenter Pieter Smit, and bricklayer Leendert Besey. The Antonymolen is the only windmill in the Hoekse Waard to have a black hull. The mill is now owned by the Foundation for the Preservation of Mills in Binnenmaas. Tours of the mill are available by appointment.