This thesis focuses on the examination of the mountain Plabutsch and the area around it in terms of its usage for school lessons.The introduction deals with the value of geoscientific subjects at school and an insight into the educational development of the natural sciences is given. Furthermore, this part explains the term Geocaching. The main part of this paper starts off with geologic information about the Plabutsch and is then split into one part for teachers and one for students (Geotrail). Moreover, the palaeozoic era in Graz is explained and information about the Plabutsch from an earth-scientific point of view is given. The teacher guide serves as support for the chaperons of the Geocache tour and gives detailed background information. The Geotrail itself is divided into nine stations. Each station consists of three sections. Firstly, Geo-Facts provides general geologic information. Secondly, Geo-Data gives information about regional aspects and finally, Geo-Acts offers different active tasks. This thesis makes a connection between geologic theory and outdoor practise. It helps to make geology more attractive for teaching at school and complements the biology and geography curricula reasonably. ?