Ключевые слова: abandoned, architecture, artistic, balkans, bright, building, bulgaria, buzludzha, circular, communist, concrete, cultural, design, destination, eerie, engineering, entrance, europe, exploration, futuristic, grass, heritage, historic, historical, iconic, isolated, landmark, landscape, monument, mountain, mystic, nature, outdoors, overview, relict, remote, retro, ruins, scenic, sky, skyline, soviet, stone, structure, tourism, tourist, travel, unique, uplifting,