"Climate change in the forest" is the big topic. The app currently contains two paths in the Teutoburg Forest Eggegebirge Nature Park, which can be followed using a GPS track (without signs in the forest) and on which different stations address the topic of climate change and the forest. Acoustic signals indicate the imaginary stations. 3D animations, representations with augmented reality and quizzes complement the topic and bring the hikes to life. At the end of a hike there is a diploma for the achievement to download.