Ключевые слова: abandoned, abstract, background, barb, barbed, barbed wire, barbwire, barricade, barrier, base, black, blue, border, boundary, built structure, cage, chain link fence, closed, cloud, concept, crime, criminal, danger, design, fence, forbidden, freedom, guard, iron, jail, lock, los, metal, military, nobody, pattern, prison, protection, razor, risk, security, separation, sharp, silhouette, sky, steel, wall, war, white, wire,