Ключевые слова: abandoned, architecture, army, artillery, attraction, barrier, border, borderline, building, bunker, camouflage, cannon, combat, concrete, czech, czech republic, czechoslovak, czechoslovakia, defense, defensive, eagle mountains, forest, fort, fortification, fortress, grass, green, guard, gun, historic, historical, history, iron, lookout, loophole, military, nature, old, outdoor, protection, sky, steal, stronghold, tree, underground, war, weapon, world war ii, ww2,