The main purpose of the final paper is to analyse the phenomenon of overtourism and the phenomenon of tourismophobia in known destinations, and to present its different forms of in destinations in Europe and Croatia. The aim of the paper is to show the development of tourism and how it has grown and what are the consequences of overtourism, how destinations respond to it and what are the possible improvements. According to the set purpose and goal, the BA thesis is divided into five chapters. The first chapter describes the chronological development of tourism in the world and Croatia. The second chapter deals with the phenomenon of tourismophobia, defines the term and gives examples in Europe and the world. The third chapter serves to present a case study on examples from Europe and Croatia. The fourth chapter describes reservation systems and how they support the mass form of tourism. Lastly, chapter five predicts the future of tourism. The paper explores what are all the factors that cause the occurrence of excessive tourism and why tourismophobia occurs in well-known mass tourism destinations.