A one-of-a-kind collection of a unique medium.

These fantastically named natural pools look like something out of a Scottish myth.

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

Abandoned railway line circling the city of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

A museum of magic with a Sadist past.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

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

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A font of vintage porn on the silver screen.

A modern-day Lascaux cave underneath Paris.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

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

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

A Parisian boutique devoted to la Sape, the elegant Congolese fashion subculture rooted in European colonization.

New York's oldest magic store.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.