Amsterdam's Red Light District leaves little to the imagination.

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

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

A true Valhalla for cactus and succulent lovers.

The largest 19th century panorama in the world still in-situ.

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

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

Lombardy poplars planted to imitate the size and shape of the Cathedral of Notre-Dame de Reims.

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

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

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

This miniature take on the Kremlin is one Dutch man's retirement project.

This historical Netherlands fortress still bears the marks of its single siege.

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

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

Two gravestones clasp hands over the religious divide.

A miniature city, once ruled by the Queen of the Netherlands.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

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

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

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

A grassy pyramid named after a French battle.

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