19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This London plaque marks the spot where David Bowie's famous alien made his debut.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

A naturally mummified 2,000-year-old man.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

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

After nearly 60 years, there's still a bear at Paddington Station looking for help.

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

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.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A cluttered and astounding collection of antiquities and curiosities.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

An incarceration museum on the spot of possibly the oldest prison in England.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

The anatomical-pathological collection of a man who changed surgery.

Eighty million natural history specimens call this gargantuan museum home.

Hear the quietest sound from across the dome.

One part local history, 99 parts gruesome haunted house.

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