Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

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

France's national museum of scientific and industrial instruments.

A museum of magic with a Sadist past.

This museum houses an imposing skeleton army comprised of creatures great and small.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

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

A haunting collection of the vanished and disappearing natural world.

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

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

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

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.

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

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

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Back in the tiny USSR.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

Con Edison’s exotic and heat-loving pests.