A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Amsterdam's former hotspot for public executions and dissections.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The attic of a four-century-old canal house hides a clandestine church.

Largest illuminated advertisement sign in the world.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It's good luck to be mocked by this monkey.

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

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

Vines grow up the metal bars in this public park created from an old machine factory.

This rusting remnant of the local herring industry is being given a second life.

This charming English house was once the home of England's most famous poet.

A museum and shop on Bourbon Street located in the French Quarter.

A pagan tradition of draping trees with rags eerily lives on.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

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.

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