What motivated people thousands of years ago to construct such a monumental and unique structure as the Heidenmauer on Mount Odilien? What secrets truly lie behind this wall, which stretches over 10 km? Some say it prevents the "spirits" of this place from entering the outside world, but what if the exact opposite was intended? Could it not be that the wall was meant to protect the inner landscape from unwanted physical and energetic intruders? What secrets are hidden within this magically mystical landscape - what is it that the wall was meant to protect? Through years of intensive research - geomantic, radiesthetic, and intuitive - the authors have delved into the mysteries of Mount Odilien. They have uncovered not only individual places of healing, vision, and initiation.