This study aims to investigate how national parks, identified as remarkable and, therefore, worthy of the trip, are visited and experienced. The main objective of this study was to explore the influence of memorable tourism experiences on environmentally responsible behavior, satisfaction, and behavioral intentions as its outcome. By giving an account of how national parks may be experienced by nature-based tourists, its main focus is on the concept of memorable nature-based tourist experience (MNBTE). The data for this research were collected through a survey from tourists visiting national parks in Serbia. The results demonstrate the significance of MNBTE as an important relationship mediator. The study’s key contributions are the extension of the memorable tourism experience construct and the inclusion of tourist satisfaction, intention to revisit, recommend, share the experience, and the environmental responsibility of tourists. Practical implications and potential future research approaches are also highlighted in the conclusion.