Relics of Australia's convict past, and a modern scene of unimaginable horror.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

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

Amsterdam's former hotspot for public executions and dissections.

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

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

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

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

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

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

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.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

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

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.