This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

One of the world’s leading and most extensive archives on the Holocaust, the Nazi era, and genocide, this collection includes published and unpublished works, press cuttings, photographs, and eyewitness testimony.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

Rebuilt remains of a temple to Roman god Mithras.

A statue of the original Pearly King is hidden in a church's crypt.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

London's amazing modernist public square that never was.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

A monolith stands at the site of the most significant battle ever fought on British soil.

The graveyard with the highest IQ in Britain.

Vast fan-shaped British cemetery honouring American servicemen lost in World War II.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.