Ключевые слова: balkan, beds, boljetin, boljetin river, canyon, cliff, cretaceous, danube, day, djerdap, environment, europe, formation, geology, gorge, hill, jurassic, landscape, landscapes, light, mesozoic, mountain, natural, nature, nature park, outdoor, outdoors, petrology, rock, rocky, scenery, scenic, sedimentology, sediments, serbia, stone, sunlight, sunny, travel, view,