Ключевые слова: advertising, aerial, aged, architecture, balkan, beautiful, boulevard, building, bulgaria, capital, cathedral, center, church, city, day, district, drone, editorial, europe, european, facade, flight, fly, footage, heritage, historic, letter, mountain, old, panorama, pedestrian, picturesque, roof, shot, sign, signboard, sofia, street, symbol, tourism, traffic, travel, urban, view, vitosha,