 Located in Popovo Polje in Ravno municipality, village Zavala with its old architecture and stone masonry, together with Vjetrenica cave, constitute the natural and architectural ensemble which is in the process of being protected as "National Monument of Bosnia and Herzegovina", and it is already placed on UNESCO Tentative List.The cave has a rich variety of fauna, with a high rate of endemism.The cave garnered worldwide fame in geological, biological and environmental communities for its imperiled and uncertain future, caused by unprofessional management lacking any expertise, and uncertain status at state and especially local level.