Nowadays W-Latvia as well as N-Lithuania as border regions are facing challenges like aging & depopulation as well as consequences of “Russian crisis” negatively influencing business and living environment. At the same regions have a good tourism (T.) development potential because of the richness of the nature, landscapes, clean environment, safety. Development of T. raises some risks for environment, however, they are little if the appropriate attention is payed to the development of suitable infrastructure. That’s the reason why (T.) is one of the priorities in context of sustainable development of border regions. The objective of the UniGREEN is to facilitate sustainable T. in border regions of LV and LT to stabilize & increase number of visitors & overnight stays in the region by new T. products and improving of existing ones making them more known & accessible for all kind of travellers, appropriate marketing activities promoting project territory as single destination for diverse nature experience (guides, maps, web),management of the nature objects (investments (3 watching towers, 7 pontoon piers, 19 info stands, 1 parking lot and 3 resting areas, 6 walking trails equipped with different edutainment elements) in 10 nature territories incl. 5 within NATURA 2000 & 2 - near them), paying attention to the products for the people with disabilities (unique approach - pilot actions: info in Braille & audio solutions, infrastructure improvements), supporting local business and development of qualitative environment for living and work of different social groups incl. with disabilities. 11 partners involved – 2 national, 1 regional parks planning region (mostly covering competence and marketing activities), 7 municipalities (focusing attention to infrastructure accessibility).