Ключевые слова: aerial, architecture, attraction, building, bulgaria, bulgarian, capital, cathedral, center, city, cityscape, conference, culture, downtown, drone, dusk, europe, event, exhibition, famous, fountain, garden, illuminated, landmark, landscape, leisure, light, national, ndk, nevski, night, of, outdoor, palace, panorama, park, relax, scene, scenic, signed, sky, sofia, square, sunset, tourism, tourist, tree, urban, water,