Doomsday bunker complex the size of a city, back up plan for mankind
They are built with super reinforced concrete and steel walls and doors just in case the bombs they stored blew up.
TAGS : the doomsday bunker complex the size of a city, back up plan for mankind, the city-sized doomsday bunker complex, house 10,000 people is being hailed as the back up plan for mankind, ifairer
