Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A stockpile of childhood lunch pails turned collectibles.

Shaped like a big top tent, this memorial honors the victims of a terrible train wreck.

Coca Cola may be "the real thing" but its inventor, buried at this Georgia gravesite, called it a "valuable brain tonic."

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A real flying saucer, contracted by the U.S. Air Force.

World's largest Christmas store.

This bronze statue was dedicated to a 1966 Beatles hit.

An architectural oddity hides in plain sight on this iconic London bridge.

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.

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

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