Here are just four of the strangest subterranean spots you never knew were there.
He knew about slave labour. Should his reputation have been trashed?
What it took to break free from Stalag Luft III…
You know it’s a forbidding, isolated fortress...
The 19th Century had a real rogues’ gallery of eerie killers…
Telling the real stories of the CIA's covert operations.
Throughout the centuries marriage has taken many different forms.
We've now come now to the 17th century in our trip through a thousand years of history.
Britain in the 1950s was still trying to shake off Victorian attitudes to sex.
Before miniskirts, thighs were rarely seen away from the beach or the swimming pool.
The Mini Cooper first rolled off production lines in 1959.
LSD, or acid, was popularised in the 60's among students and hippies.
During his National Service, Bailey bought his first camera, sparking a fresh career
Peace in 1945 brought a sharp rise in births for some years - the so-called Baby Boom.
Concorde cut the normal flight from London to New York, from 6 hours to just over 3!
The 1960s were a turbulent decade and 1968 was a turbulent year.
There have always been robbers but we didn't always have cops.
The 1960s was the decade when the Brits went on holiday.
The 1960s were the golden age of jet air travel.
The reality was that for most people living in Britain the 1960s were not that groovy.
The Spirit of the Sixties season continues by focusing on the struggle for civil rights.
Victorian Farm sees Ruth Goodman sample the life of a Victorian farmer for a whole year.
A History of Modern Britain explores the true story of the decades since the end of WWII.
This series takes a closer look at some of the world's most talked-about assassinations.
Many sons spend time with their dads building cardboard forts or model planes.
The journey of a set of shopkeepers from the Victorian age through to the 20th century.
This documentary reveals how caravans became a favourite with British holidaymakers
Our ancestors learned skills, passed down through generations, making sure life evolved.
The Air Transport Auxiliary (ATA) played a vital role during World War II.
Escape stories capture the human imagination and grip it tight.
Get a taster of Fight Club: A History of Violence with our clip.
Dan Snow uncovers cities with a murky past and where the people were, too.
Best known for being the only US president to have been impeached.
Andy Warhol's work led him to the forefront of the Pop Art Movement.
Frank Sinatra is best known for his sparkling blue eyes and smooth as velvet voice.
The 60's saw the height of the Cold War, but no where more acutely than in Berlin...
George Best wasn't just one of the greatest footballers, he was also a superstar.
One small step for man, one giant leap for mankind. The Apollo mission shook the world.
The Munich air disaster took place on 6 February 1958, with the loss of 23 lives.
Historian James Holland examines how Britain felt at the end of the war.
Larry Butler investigates how WWII affected Britain and the relationship to her Empire.
1945 saw the end of the Second World War, it was to be a defining year.
We profile the dignified leader of the civil rights movement.
1966 Football World Cup captain, Bobby Moore was one of Britain's media darlings.
Young, glamorous and sexy, the US welcomed John F Kennedy as a breath of fresh air.
They were the greatest band the world had ever seen and the first boy band!
Love her or loathe her, there's no denying that she changed British politics forever.
A true Hollywood icon, Marilyn Monroe died in 1962 aged just 36.
Find out more about the war that shook America's military self-confidence to the core.