The karst territories are characterized by landscape aesthetics, and provide knowledge for the natural systems and their specific ecosystem servises. They are important part of the natural heritage and geodiversity. The aim of this study is to present karst territories as an element of the national natural heritage and as a source of cultural ecosystem services. The results provide a new type of knowledge for the recreational capacity of the karst territories in Bulgaria, and in particular of the caves in district of Smolyan.