This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

An underwater statue of Christ blesses the depths off Key Largo.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

It's a pretty creepy lock-up.

A monument celebrating the idea of reaching inaccessible places.

Throughout this South Korean village, homes and businesses are covered in fantastic handpainted murals.

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

This 18th-century sundial was designed to calculate the date of Easter each year.

The video game-themed street art first popped up in the French city.

This Parisian gem is one of the most incredible ethnographic museums in the world.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This house is one of the most colorful in the country, and is the last remaining example of a historic villa.

An all-female order shares an ancient culinary art with visitors at their mountaintop monastery.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

An enormous public square and parade ground built to celebrate Ghana's independence.

The world’s largest digital waste dump has become a site where organized criminals hack into confidential government data.

Where thousands of slaves passed through the "Door of No Return."