This historic Amsterdam bar used to accept sailor's monkeys as payment.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Peek through a transparent pyramid and drink in the mountain made of books.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam 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.

Cat art as far as the eye can see.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

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

The world's only museum devoted to the wonders of fluorescence.

A 13th century fortified house built to defend the Duchy of Burgundy.

The ruins of an abandoned cemetery are among the last remnants of the old village of La Boulaye before a wealthy landowner had it relocated.

The deserted pirate-themed restaurant still entices explorers.

15,000 year old bison sculptures.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

A garden of massive sculptures sits in Jean Lindard's backyard.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

Exquisite examples prehistoric bas-relief carvings.

This anatomical sculpture raises awareness about violence against women and promotes gender equality.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.