This paper aims to analyse one of the world’s top tourist destinations, the Mediterranean, and, more specifically, the evolution and impact of mass tourism on its western islands (Corsica, Sardinia, Sicily, Malta and the Balearic Islands) throughout the final decade of the 20th century. Firstly a general overview of world tourism is given, followed by an analysis of tourism in the Mediterranean. In continuation, an in-depth study is made of the evolution and impact of tourism on the aforementioned islands. Finally, the economic impact of tourism specialisation is examined in these island regions.