The personal library of the founder of modern neurology is open to visitors.

One of the oldest masonic museums in Paris.

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

This Parisian fountain is a little bit fantasy and a little bit nightclub.

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.

BDSM, 1930s Style.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

Statue of death tucked in the University of Medicine courtyard.

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

Noirish green neon marks the location of one of the oldest private detective agencies in France.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

Taxidermied animals galore, by appointment only.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

A tongue-in-cheek arcade where the games are based on everyday life.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The anatomical-pathological collection of a man who changed surgery.

A mysterious artist-run cabinet of curiosities and library.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A naturally mummified 2,000-year-old man.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.