Dad; France, Belgium, Netherlands

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

A haunting collection of the vanished and disappearing natural world.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A former plague hospital turned medical museum.

People have been placing babies on these lilies for photoshoots since the Victorian era.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

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

Unknown to many, this is where items not displayed in a Dutch history of science museum are held.

Museum preserving torture methods from the past.

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

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

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

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

Europe's official "zero-level," the equator of elevation.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This massive library holds what was once the largest book collection in the world.

France's national museum of scientific and industrial instruments.

Statue of death tucked in the University of Medicine courtyard.

A unrivaled and rather horrifying collection of wax dermatological models.

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

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Medical history with an amazing, if frighting, collection of wax diseases on display.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

The world's first interactive human body museum also serves as a chair for a giant orange man.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

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

Indents in the pavement are all that remain from a grisly death machine in Paris.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The history of radiation is on safe display at the foot of a radiation science laboratory.

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

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

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

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The history and future of cannabis.

A beautifully eclectic mix of architectural styles.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

Climb inside an iron crystal magnified 165 billion times its normal size.