A haunting collection of the vanished and disappearing natural world.

A museum which takes visitors to the côté obscure of Paris.

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

A museum of carnival attractions where you are invited to ride the rides.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

This massive library holds what was once the largest book collection in the world.

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

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

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

A massive underwater sinkhole made famous by Jacques Cousteau.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The hallucinogenic center of the ancient world.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

They squeal, they nosh, they look like predators.

In paradise, feral pigs have claimed an island all to themselves.

One of the deepest blue holes in the world.