The Old Mill of Hengel is a small stone mill in the town of Ootmarsum. Itw as built in 1872 to replace a wooden mill of the same name that was destroyed by fire after having been struck by lightning. The mill was decommissioned in 1951, and entered a state of decay. In 2005, restoration work began. At the time of writing, the mill is still closed, and is in need of more restoration work.