Ключевые слова: abandoned, adit, base, basement, bunker, catacomb, communication, concrete, construction, corridor, curve, dark, decay, deep, defending, destroy, dungeon, empty, end, exit, facility, fort, fortress, hope, indoor, inside, interior, light, military, mine, mining, nuclear, old, passage, perspective, post apocalyptic, protection, secret, shelter, soviet, strategic, strong, subway, supply, tunnel, underground, urban, vault, vaulted, way,