Ключевые слова: adventure, ancient, arch, attraction, background, beautiful, bulgaria, cave, cavern, cliff, dark, destination, devetaki, devetashka, environment, europe, famous, formation, geology, green, hole, inside, interior, landmark, landscape, light, lovech, mountain, natural, nature, old, outdoor, park, railing, rock, scenery, scenic, stone, stream, tourism, travel, tunnel, view, wall, water, wooden,