Incredible labyrinth of man made caves.

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

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

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

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

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

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A grassy pyramid named after a French battle.

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

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

Take a walk in a recreation of ancient Rome.

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

A beautifully eclectic mix of architectural styles.

Building Men of War and Indiamen from Holland's Golden Age.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

Hindu temple of the dead home to hundreds of long-tailed macaques.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.