A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Love is in the air along the small street in Brooklyn.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This giant wooden treehouse within a sprawling garden has its own eatery.

The sign at the garden gate reads: "These Plants Can Kill."

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Protecting the dead from opportunistic body snatchers.

The most loyal of little dogs, or a Victorian era publicity stunt?

This small museum in a 17th-century building honors three iconic Scottish writers.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A sweet symbol marks the place where torturous executions were once carried out.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.