This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A network of concealed passageways lies within a busy London Underground station.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

The television series' iconic giant foot was borrowed from this classical painting.

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

A mysterious artist-run cabinet of curiosities and library.

A cluttered and astounding collection of antiquities and curiosities.

This 1920s Dutch barge is now a floating bookstore.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

An unusual round church in London with a Templar past.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

Hidden beneath the streets of London is a secret subway that only carried mail.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

Two New York rooftops are home to the largest rooftop soil farms in the world.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

This tiny alleyway is now a shrine to a subculture riot between the mods and rockers.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.