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

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

An artistic tribute to the famous singer, just around the corner from where he was born.

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

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

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

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

A cluttered and astounding collection of antiquities and curiosities.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

This 1920s Dutch barge is now a floating bookstore.

A hands-off space for graffiti artists to hone and display their skills.

The curios of pharmacist and collector Henry Wellcome.

An unusual round church in London with a Templar past.

Eighty million natural history specimens call this gargantuan museum home.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Macabre astrological automaton clock dating to the late 1400s.

Home to items never before seen by the public.

Famously misunderstood wonder of the ancient world

A beautiful geyser under environmental threat.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.