The Ostmühle (East Mill) on the Mühlenberg (100 meter above sea level) in Gildehaus is a Dutch-style tower mill. The mill was built in 1749/1750 from Bentheim sandstone and has a long and turbulent history. Three year before a violent storm destroyed a wooden mill on the same spot. The mill was privately owned from 1913 to 1986. It was in danger of being demolished several times.

After a restoration the mill has been in operation again. Today, it is preserved as a historical monument and is open to the public on certain days, allowing visitors to see its historic milling equipment.