This chapter presents a methodological contribution to promote behavioural change in tourism. The authors argue that the sophisticated and modern tourist demands meaningful experiences that trigger self-actualization that can lead to self-transcendence. The concept of ‘transmodernity’ is then introduced, showing how the transformation goal is to change a person into a specific direction addressing broader sustainability goals. The chapter further draws on empirical data in a nature-based setting to illustrate the influence of methods on testings and evaluations, and also, how they shape people’s thinking, theory crafting, and knowledge producing.