19 facts about Bulgaria. 3. Bulgaria’s “Rose Valley” produce most (70-85%) of the world’s rose oil. 8. Though small in area, Bulgaria ranks third in Europe in biodiversity, with a number of rare and endemic species. More than 700 brown bears, 1,000 wolves, golden jackal, wild cats, common otters, souslik and 37 species of reptiles can be found here. 10. A third of Bulgaria is forested. (hence the biodiversity). 17. Bulgaria Has The 2nd Most Mineral Springs In Europe, just behind Iceland.