Ключевые слова: aerial, aerial view, balkan, balkans, bulgaria, cascade, dam, drone, engineering, environment, europe, fishing, forebalkans, forest, golyama zhelyazna, hydro, hydroelectricity, irrigation, kalnik, kalnik river, lake, landmark, landscape, lesidren, lovech, lovech region, meadow, mountain, natural, nature, panorama, peninsula, reservoir, river, scenics, sight, sightseeing, sopot, sopot reservoir, stara planina, stara planina mountain, tourism, travel, troyan, view, vit, water, wilderness,