This work is a presentation of the ecological peculiarities of nature in the Park with an emphasis on biodiversity as a precondition for the development of a special form of tourism. If we consider all the facts from the books, information from the questionaire, that we collected in the Park from the visitors, there is no doubt for the developing of this type ( form) of tourism. Visitors were randomly selected to participate in the survey and they believe that biodiversity is a prerequisite for the development of sustainable tourism or a special form of tourism. In this sense, nature observation tourism, adventure tourism, ecotourism, wildlife tourism and nature-based tourism are considered.There are also obstacle for realization this tipe of Tourism. Insufficient host interaction with visitors, ecological-biological sustainability, which must be more important than economic sustainability and education. Education and communication must reach a higher level if the guests want to reach emotional levels while they are visiting the park. Only if we awake emotions in the guests, than they will get the full atmosphere of our Nature. A recognizable brand should be created “Nature“ as a unique product, as the most important factor in the developening of naturebased tourism. Educational program, new activities for visitors with interaction in terms of conservation and sustainability are indispensable elements in creating a quality tourist package. All visitors are active in ecology and appreciate nature conservation. Although Krka National Park with all its beauties is important for the tourism of the entire ŠibenikKnin County. The Nature beauty is not timeless. We need to observe it from the point of Nature enthusiasts and from the point of economists who are oriented to ecological based Tourism.