Buckingham Palace boasts a staggering 775 royal rooms – so it’s no surprise there are few hidden gems.
The 93-year-old monarch Queen Elizabeth II has lived in the London-based residence since 1952.
Whilst some of the lavish interior and sprawling gardens has been caught on camera or seen by privileged guests, a lot of it remains behind closed doors.
According to The Royal Family’s website, the palace houses 19 state rooms, 52 royal and guest bedrooms, 188 staff bedrooms, 92 offices and 78 bathrooms.
But would you have guessed that the Queen’s home also boasts a secret cinema, swimming pool – and even a post office?
Such is the trend in modern homes, Buckingham Palace has a private screening room.
BBC journalist Emily Maitlis revealed she saw the cinema room – which is actually for staff – being set up as she arrived to interview Prince Andrew in November.
She wrote in the Times that a worker told her: “It’s for the Buckingham Palace cinema. All the people who work here come along. It’s Judy tonight if you want to stay.'”
And then, what Palace would be complete without a Post Office?
All 800 members of staff can use the Court Post Office, which is run by Royal Mail.
It was first snapped in 1941, but what it looks like today is a mystery.
There’s also a doctors office on site, which is run by the Queen’s GP Dr Timothy Evans, according to Hello! Magazine.
Again this is mainly for staff use, as the Royals opt for private care.
As well as a Post Office and a doctors, Buckingham Palace has a private chapel.
Created by Queen Victoria and Prince Albert in 1844 in what had been designed as a conservatory, the place of worship was destroyed in the Blitz.
It has been rebuilt in the south-eastern part of the palace.
The Palace also boasts a full-sized swimming pool which, again, can be used by both staff and the Royals.
In fact, Kate and William reportedly took Prince George there for private swimming lessons when he was first starting to dip his toes.
And hidden away in the White Drawing Room is something straight out of a mystery novel.
There’s a secret passage disguised as a mirror and cabinet, concealed from view.
The door leads straight to the Queen’s private state apartments.
The passage is how the Queen greets guests ahead of small gatherings.