The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

A set of seven houses, each built in a style that represents a European country.

A late-medieval Dutch castle with trick fountains in its whimsical water gardens.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

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

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

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

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

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

Incredible labyrinth of man made caves.

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

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

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

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

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

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

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

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

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

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

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

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.