Guided tours of memorial museums have sought to have an impact on visitors through an affective learning environment and critical reflection leading to 'action'. However, there is limited work investigating the pedagogical underpinnings of such guided tours in order to understand whether they can facilitate action. This paper presents reflections of 21 students' experiences of educational visits to the former Nazi extermination and concentration camp Auschwitz-Birkenau, Poland between 2017 and 2018. Students identified the guided tour of Auschwitz-Birkenau as having an affective dimension that enhanced understanding and brought about a perspective transformation but action was ill-defined. In considering ill-defined action, this paper attempts to frame understanding of the guided tour of the memorial museum within the context of Transformative Learning. It concludes that guiding practices should incorporate space for reflection and provide examples of potential 'action' so that visitors can mobilise their deeper understanding and experience long-term personal 'change'.