An unusual number plate signifies the building's saucy past.

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

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

This Parisian café sticks almost exclusively to an ethos of reuse.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

Abandoned railway line circling the city of Paris.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Massive galleon from a box-office bomb docked in Genoa.

Statue of death tucked in the University of Medicine courtyard.

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

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.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

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

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

A unique zoological park home to over 30 species of wild cats, both big and small.

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

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

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

A long-buried ancient ruin unearthed right in the middle of the city.

Auguste Maïcon, a pioneer in French aviation, was born in this house in 1891.