The sign at the garden gate reads: "These Plants Can Kill."

London's smallest police station is barely the size of a phone booth.

A hands-off space for graffiti artists to hone and display their skills.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

A surrealist timepiece by the artist of melting clocks.

France's national museum of scientific and industrial instruments.

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

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Notorious artist squat renovated into legal studios.

A stunning 18th century pharmacy and medieval chemist's collection.

Packed to the ceiling with antique taxidermy and hunting arms.

The Natural History Museum that time forgot.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

A church of bones, decorated with 40,000 human skeletons.

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

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

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

An eerie, derelict amusement park in Berlin.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Tiny Swedish village with a distinct local phenomenon known as an "Elk Shower."

Home to three historic ships from the age of Vikings.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.