The development of forest therapy (FT) was triggered by the need to relax in the forest and to isolate from various stressors. Professor Qing Li, of the Department of Rehabilitation Medicine, Nippon Medical School Hospital, Japan, the world’s foremost expert in forest medicine and immunology, and Amos Clifford, the founder of the US-based Association of Nature and Forest Therapy, the world-leading organization in the movement to integrate nature and forest therapies, recognize FT as a method in which the natural environment of the forest is used for health care practices. To explore the effects of forest therapy in the Kranjska Gora tourist destination, experimental research on 50 tourists was implemented. The physiological stress markers and psychological effects on tourists were measured by designing and following a specific forest therapy protocol. The results provide clear evidence of positive outcomes and health benefits for tourists. Additionally, the forest therapy experience is presented through the tourists’ fit-back and perception. The research results could be beneficial for destination management, tourist providers, and the development of forest therapy tourism activities, as well as the well-being of forest tourism.