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

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

A market built atop boats is one of the few floating holiday markets in Europe.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

A former plague hospital turned medical museum.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

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

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

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

Amsterdam's former hotspot for public executions and dissections.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

A unique collection of gilded age mechanical pianos.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

A public urinal so pretty, it was declared a national monument.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

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.

Colorful and chaotic stacked hotel in North Holland.

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