Many outdoor spaces have hidden stories connected with them that can be
used to enrich a tourist’s experience. These stories are often related to environmental
features which are far from the user and far apart from each other. Therefore they are
difficult to explore by locomotion, but can be visually explored from a vantage point.
Telling a story from a vantage point is challenging since the system must ensure that
the user can identify the relevant features in the environment. Gaze-guided narratives
are an interaction concept that helps in such situations by telling a story dynamically
depending on the user’s current and previous gaze on a panorama. This chapter
suggests a formal modeling approach for gaze-guided narratives, based on narrative
mediation trees. The approach is illustrated with an example from the Swiss saga
around ’Wilhelm Tell
