The ritual has been performed uninterrupted for nearly 700 years.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

This luxury shopping lane has been protected by its own tiny police force for over a century.

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

A clock designed to run with perfect accuracy for 10,000 years.

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

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

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

Hear the quietest sound from across the dome.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

This museum inside a museum tells the story of London's timepieces.

Charles Babbage's proto-computer, painstakingly brought to life.