Tucked away in the far corner of woods, hidden hundreds of feet underground and filled with subterranean corridors and rooms that serve as an eerie reminder of past tensions - Greater Manchester is home to a string of little known nuclear bunkers.
They were built at a time when there was very real fear of a nuclear war, some in secret. During the Cold War Britain was as an ally to the United States, who were at war with the Soviet Union, and needed their own nuclear deterrent.
A fascination for urban explorers and even a destination for illegal ravers, here is a round up of some of the secret shelters and what they have now become.
