Ключевые слова: ancient, antique, architecture, background, balkan, beautiful, blue, building, bulgarian, castle, church, city, cloudy, destination, europe, fort, fortification, fortress, green, hill, historical, history, landmark, landscape, medieval, monument, mountain, nature, old, outdoor, panorama, panoramic, rocks, scene, sky, stone, stronghold, summer, tarnovo, tourism, tourist, tower, town, travel, trees, tsarevets, vacation, view, wall, watchtower,