One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

This ancient market is often referred to as the oldest shopping mall in the world.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

The grave of the legendary "Bonzo" can often be seen covered in cymbals and drumsticks.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

The fountain marks the area where hundreds of accused witches were burned at the stake.

The history of radiation is on safe display at the foot of a radiation science laboratory.

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

The oldest stone house in Paris was built by its most famous alchemist.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

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

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 vast, legendary catacombs hold secrets much stranger than stacked bones.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

This bridge was constructed from the rubble of the infamous Bastille.

Indents in the pavement are all that remain from a grisly death machine in Paris.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.