10 school classes and private groups from nearby camp sites could profit from nature education at the mill of Kalborn for 2017 so far. Field trips to the river Our and visits of the mussel rearing facility for the thick shelled river mussel (Unio Crassus) and the freshwater pearl mussel (Margaritifera margaritifera) were organised. More than 300 people can now profit from the knowledge about freshwater resources.