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

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

Incredible labyrinth of man made caves.

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

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

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

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

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

A former plague hospital turned medical museum.

A beautiful maze marks where three countries meet.

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

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

The attic of a four-century-old canal house hides a clandestine church.

A curious collection dedicated to human and animal anatomy and pathology.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

A botanic garden full of trees twisted into fantastic shapes and positions.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

Only known mainland rookery of the threatened Stellar sea lion.

An institution that preserves the history of institutionalization.

Treehouse motel and treehouse-building school.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.