Standing guard over the city of London for nearly 1000 years, this formidable fortress has been a royal castle, a prison, a place of execution and torture, an armoury and the Royal Mint. Over the centuries it has gone from a symbol of imperialism and tyranny to a national treasure- the protector of the crown jewels and many other historic British traditions. In this episode we go behind the Tower's ancient walls, opening it up to expose its secrets and stories. We'll unlock the doors to rooms you didn't know existed, talk to the people who do the jobs no one sees and reveal some surprising facts about one of England's most famous icons.