This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

Their motto is, "We've been bonkers for hats even longer than you have!"

The Southern California pop sounds of surf and sand were born right here.

Celebrating the accomplishments of Black firefighters in Los Angeles.

Fans of the spicy bright-red sauce can tour where it's made.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.

The Sun King's military models, saved from the Louvre.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

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

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

The historic Masonic Lodge in which the first-ever female Mason was initiated.

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

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

Abandoned railway line circling the city of Paris.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

France's national museum of scientific and industrial instruments.

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

One of the oldest medical collections in Europe focusing on rare surgical instruments.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.