Ключевые слова: aerial, aerial view, bulgaria, destination, drone, earth pyramids, ecology, environment, formation, geological, hill, kocherinovo, kyustendil region, landmark, landscape, limestone, mountain, natural, nature, outdoor, outdoors, panorama, panoramic, park, phenomenon, pyramids, rila, rila mountain, rock, scenic, scenics, season, sight, sightseeing, spring, stob, stob pyramids, stone, tourism, travel, water, wilderness, wind, yellow,