The subject of this master’s thesis is ecotourism. One part refers to the offer and approximation of the picture of the state of nature with an emphasis on the Strict Reserves Bijele and Samarske Rocks and the Plitvice Lakes National Park. There is a discussion about types of tourism that are based on positive change, such as ecotourism, transformative tourism, responsible tourism, mountain tourism... The thesis is looking for a balance between human enjoyment and what we do to the planet with our enjoyment. Today, a social phenomenon is noticeable all over the world in which travel serves as a catalyst through which responsible citizens strive to change themselves and the world in which they live. The new vision seeks to go beyond the current unsustainable and materialistic behavior towards the creation of a fairer world shaped by higher values and more meaningful and responsible lives. Answers are sought to the question of whether and how tourism can help shape new social visions. This thesis emphasizes mass tourism and the consequences it leaves behind. Through examples of green practices, carrying capacities and state projections; states how an individual, local community, society or company can become aware of the need for change and contribute to a more sustainable life and nature protection. Numerous examples and statistical analyzes of the movement of tourists in protected natural areas are cited, which are compared with each other. The factors of certain tourist behaviors and how to sustainably change them are sought.