The most secure prisons

Most of us are law-abiding citizens who do not pose a threat to other people, but there are also such inhabitants of the planet who simply cannot remain in society and enjoy freedom, because they are dangerous to others. It was for such people that prisons were invented - closed institutions with a strict regime. The first prisons existed even before our era - so the judges gave the criminals a chance to think and improve. However, not all people are ready to learn from their mistakes, and they commit atrocities again and again. For such "inveterate" criminals there are special prisons, which are famous for being the most severe, the most guarded and at the same time the safest.