Ключевые слова: aerial, aerial view, balkan, balkans, bulgaria, cascade, coprinka, dam, drone, engineering, environment, europe, forest, georgi dimitrov, hydro, hydroelectricity, kazanlak, koprinka, koprinka reservoir, lake, landmark, landscape, meadow, mountain, natural, nature, panorama, peninsula, reservoir, river, rose, rose valley, scenics, sight, sightseeing, stara planina, stara planina mountain, stara zagora, stara zagora region, summer, terrain, tourism, travel, tunca, tundzha, valley, view, water, wilderness,