 The Gut Holzhausen estate is a biodynamic farm and the venue for a summer festival called Voices.As Nieheim's landmark, the Holsterturm (tower) on a nearby bank south of the main town, can look back on a 700-year history.Unique in Westphalia is the vault system through which runs the "Nikolausbach" (brook), which rises below the Holsterberg (mountain) and runs through the middle of town in this mediaeval vault system.