The 3 treasures in Passauer Land consist of the Haus am Strom environmental station with the Jochenstein hydroelectric power station, the Hauzenberg granite centre and the Kropfmühl graphite visitor mine. For these 3 facilities the GEO-Zentrum at the KTB and the Geozentrum Nordbayern of the University of Erlangen-Nuremberg, in cooperation with teachers of different schools and representatives of the 3 treasures, developed a handbook for teachers. This gives pupils an insight into nature, energy and raw materials. Now it is possible for you to explore the 3 institutions on your own and closely oriented to the curricula.