This is a unique wood area. For decades this is where hydraulic engineers studied the impact tides and water flows would exert on major hydraulic projects, such as the Delta Works. The Netherlands owes much of its international reputation for water management on the research that took place here. Dozens of weirs, sluices and hydraulic models are secluded away in the woods. You’re never far from the sound of flowing water. Deltawerk//, the impressive piece of land art, is one of the major attractions in this former open-air testing ground.