A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The pockmarks across the building's facade are remnants of the Blitz.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

The ritual has been performed uninterrupted for nearly 700 years.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

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

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

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.

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

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

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

Step back in time while shopping inside this local store.

This 16-foot-diameter wooden coin has been standing in Iowa City since 2006.

Grant Wood painted some of his most famous works of art at this studio.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

The oldest university museum west of the Mississippi retains its 19th century feel.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A touching tribute to a local hero who made sure his neighborhood stayed clean.

The oldest military monument in the United States.

This statue honors the author's groundbreaking family story.