Ключевые слова: aerial, aerial view, architecture, assembly, bell, bell tower, brutalist, bulgaria, capital, children, communism, communist, culture, destination, drone, flag, flag of peace, heritage, historic, history, international, international childrens assembly, kambanite, landmark, memorial, monument, mountain, outdoors, park, park kambanite, peace, sight, sightseeing, sofia, the bells, touristic, tower, travel, trip, un, unesco, unicef, urban, view, vitosha, vitosha mountain, zname na mira,