Ключевые слова: aerial, aerial view, bulgaria, bulgarian, cascade, countryside, dam, drone, energy, engineering, fishing, geological, gorge, haskovo, haskovo region, hydro, irrigation, landmark, landscape, majestic, meadow, nature, old, power, reservoir, resource, rural, scenics, sight, sightseeing, structure, sunset, terrain, thrac, thracian, thracian plain, trakiets, trakiets dam, trakiets reservoir, travel, upper thracian plain, view, water, wilderness, window, winter,