The museum visit is a collaborative activity: people typically visit museums in social groups, and conversation between group members has been highlighted as a key aspect for an engaging visitor experience. In this work, we detail initial findings and experience results from the design and evaluation of a group-based digital storytelling journey, where visitor-to-visitor engagement takes place under the frame of an interactive, mobile technology-based story. The results suggest not only the potential to cultivate social interaction between individuals using their own mobile devices, but also to generate immediate transcultural and transgenerational understanding and cooperation in situ.