Ключевые слова: artillery, balkans, beautiful, bulgaria, bush, cannon, cliff, eco, ecology, environment, forest, grass, gun, hike, hiking, hill, hilly, historic, historical, history, landscape, memorial, mountain, mountains, natural, nature, nobody, outdoor, outdoors, park, pass, picturesque, planina, position, rock, rocky, rough, rural, scenery, shipka, slope, stara, stone, summer, summertime, tree, trees, two, view, wild, woods,