This demon atop the Notre-Dame de Paris looks utterly bored.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Believed to be the birthplace of the United States Marine Corps.

Yo, Adrian!

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

This elaborate towering structure was once famed for its revolutionary height.

A collection of haunted objects and macabre oddities under one roof.

A homage to the King at the hotel where he revived his career.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A bizarre house filled with an astounding array of collections.

This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."