This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The location of this small park was once the site of an infamous public morgue.

Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

A memorial to a goat culled during a foot and mouth disease outbreak guards a series of fantastical caves.

A museum marks and documents the site of the Titanic's launch.

A series of stained glass artworks that depict images of the hit TV show.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

The lighthouse is on a island which is connected to another island, which is connected to another island, which is connected to one of the largest islands in the world.

One of Ireland's most infamous prisons for rebels including men, women and children.

The Dublin sea wall draws walkers, photographers, and fishing enthusiasts.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Standing at the site of his former school, this sculpture celebrates Darwin's groundbreaking contributions to science and his deep connection to his birthplace.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The unusual burial monument of Arizona's first governor.

Millions of years of erosion created the feature for which this rock formation is aptly named.

In 1975, a forestry worker in Arizona claimed to have been abducted by a UFO.

This balancing rock is one of Utah's most unusual geological formations.

The location where the iconic movie character declared it was time to go home.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.