Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

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

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Banksy gives themself artistic license with this piece of London street art.

A historic house left in "dramatic still life."

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A cluttered and astounding collection of antiquities and curiosities.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Hear the quietest sound from across the dome.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

An unusual round church in London with a Templar past.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This South London cemetery holds the remains of more than 15,000 people.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The largest of London's subterranean rivers and once a mad, bad center of London life.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

This California estate was either haunted by ghosts or the Marx brothers.

The ghostly remains of an accidental sea.