Planet Earth is rich in water in various forms, which we often cannot even see. In addition to surface waters, such as rivers, lakes, streams, seas and oceans, there are also groundwater and streams. It can be said that our surface water "disappears" underground, but is that the only way our water disappears or is there human influence? You can find out at this workshop exactly how the diversion of rivers, the construction of dams and hydroelectric power plants make water disappear.