This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

A modern reimagining of a medieval city gate.

This former hydraulic laboratory is now a woodland dotted with old engineering models.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Hop aboard a charming bog train to explore this rare open-air museum of peat.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Science meets wall art to highlight the beauty of famous mathematical equations.

An ancient Egyptian temple sits within a modern European museum.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

A giant floating rubber duck-bunny painted with a different design every year.

“And the Lord said unto Johan, build for thee an ark for the end of the world is approaching.”

Repurposed space and ultra-modern construction collide to create this geometric wooden spectacle.

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

Home to the world's oldest functioning orrery.

A 1:20 scale piece of the Netherlands commissioned by a queen lets visitors take a stroll as giants.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

Rumored to have been frequented by Vincent van Gogh, it's the only remaining genever producer in the Hague.

Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

A statue of the second-tallest Dutchman in history.

Yup, that's a 330-foot yacht passing over the highway.

The former headquarters of history's oldest megacorporation.

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

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.