A wood ant colony in Poland has made a home for themselves in an abandoned nuclear bunker. These ants are the unlucky ones that fell through a ventilation shaft which the forest floor ant nest is built on. The colony only contains workers and there is no food available, so the ants are doomed to starve. http://arstechnica.com/science/2016/09/bizarre-ant-colony-discovered-in-an-abandoned-polish-nuclear-weapons-bunker/