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

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

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

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

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

Atop this former dutch railway office sits an interstellar work of art.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

A grassy pyramid named after a French battle.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

Unchanged for centuries, this medieval library keeps its books in chains.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

Home to the world's oldest functioning orrery.

The 20-mile causeway that separates the Netherlands from the sea.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

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

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

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

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