The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

The curious underground history of keeping Paris clean.

One of Jeff Koons’s largest sculptures and his first commemorative work.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

The final resting place of soldiers' loyal canine companions.

An artist's whimsical transformation of everyday objects.

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

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

The colorful stairs are made with marble from the world's major quarries.

A showcase of canine neckwear spanning five centuries of doggie fashion and function.

Banksy gives themself artistic license with this piece of London street art.

This London marker celebrates the spot where the world-famous English band was founded.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

This unique art installation used boiler tubes from a decommissioned power plant to resemble Antelope Canyon.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

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.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The beloved dining spot stands at the cross-section of Hollywood and the Old West.

An Old West film set seen in countless TV shows and movies is open for the public to explore.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.