The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

One of downtown Berlin's last reminders of its Communist past.

The footprint of a frustrated devil in Munich's Cathedral.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This demon atop the Notre-Dame de Paris looks utterly bored.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

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

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

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

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

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

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

A haunting collection of the vanished and disappearing natural world.

A surrealist timepiece by the artist of melting clocks.

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

Macabre astrological automaton clock dating to the late 1400s.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

This statue commemorates the meeting of the most influential minds of the women’s rights movement.

An antique cemetery in New York, this land is home to any number of famed corpses.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

The library of every book lover's dreams.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.