Elevated freight railway turned wildly successful urban park.

Tucked in the back of this amazing antique store is an important piece of medical history.

A terrific purveyor of natural history objects and curios.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A saintly relic hidden in a Prague church basement.

Microscopic scenes; some call it novelty, some call it art.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The first museum in the world devoted to sexual gadgetry.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.

Weird wax anatomical models reside here, as do other anatomical specimens.

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

Dedicated to the art of hunting, with juxtapositions of contemporary art.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

The largest medical and anatomical collection in France lies hidden from the public.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

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