The project ''Sustainable development of Special interest tourism (SUD SIT)'' lasted for two years, began on 16 September 2013 and was completed on 15 September 2015. During this period, all planned project activities were implemented. Project was implemented by grant beneficiaries Association of Croatian Travel Agencies (UHPA) (with partners in Croatia - Association of Agrotourism Konavle and Regional Development Agency of the Dubrovnik-Neretva County - DUNEA) and Municipality of Tivat (with partners in Montenegro - Tourist Organization of Tivat and Public community for communalities Tivat). Financial data: The total project value is € 351.847,01, of which the amount of grant of the European Union is € 293.597.32. The total value of the project in Montenegro is € 209.560,05, of which the amount of grant of the European Union is € 174.560,05. The total value of the project in Croatia is € 142.286,96, of which the amount of grant of the European Union is € 119.037,27. At the beginning of the project implementation the Assessment of potential for development special interest tourism in cross-border region was drafted. The assessment of potential is the result of research, interviews and work of the author in the focus groups, with a view of making recommendations for the development of tourism of special interests, then the identification of potential sites for tourism infrastructure and modes of evaluation of tourism products. Over one hundred kilometres of bike paths in Konavle was improved or re-arranged, adequately marked with over 100 signposts, mapped and adjusted for GPS tracking devices. The former narrow-gauge railway was adapted for the purpose of hiking and cycling which increased the attractiveness of the route. The number of group and individual consultations for tourism of special interest that introduced the European standards of sustainability in tourist sector (“Travelife standards”) were held during the project with the aim to introduce these standards in the newly developed joint tourism offer. In total 20 new cross-border routes and itineraries of special interest tourism were developed within the project as products of these consultations. The study trip to Istria was attended by 44 representatives of travel agencies, local service providers in tourism and representatives of relevant institutions from Montenegro and Croatia for the purpose of experiencing the best practice in the field. Numerous trainings and consultations were held during the implementation of the project, with an emphasis on 6 specialized trainings of tourism of special interests in Konavle and Tivat, which were attended by more than 300 tourism professionals. In addition, the feasibility study and technical design for improvement of bike infrastructure in rural areas in Tivat were developed and the bicycles and electrical bicycles for the development of cycling tourism in the project area were procured. Promotional materials were prepared and foreign tour operators visited the project area (6 representatives of EU tour operators interested in development of new products for special interest tourism and establishing cooperation with local entrepreneurs). Cycling and multiactivity races as promotional project events were successfully organized in Konavle and Tivat. The “Cross-Border Tourism, Croatia-Montenegro (http://www.crossbordertourism.com/)” website was developed in order to serve for the promotion of special interest tourism in CB area of Croatia and Montenegro by presenting the new image of a destination attractive in all seasons. The website is designed for business sector (tour operator, travel companies, tourism service providers), tourist (group and individual), local stakeholders (tourism organizations, CSOs). The project has contributed to expansion and better use of diverse sustainable special interest tourist offers through joint actions on the cross border territories of municipalities of Tivat and Konavle. Also, the project has developed the new products for tourism of special interests and expanded tourist offer in the cross border area. It has also contributed to increasing the number of tourists during off-season, tourism revenues and improving the living standards of the residents. Furthermore, all project participants had the opportunity to get acquainted with current trends, gain the knowledge on the tourists’ requirements and learn about new marketing tools.