A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

The site of the first battle of World War II.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The history of sea-faring refuse and disaster is on cramped display in this Netherlands folk museum.

Hop aboard a charming bog train to explore this rare open-air museum of peat.

An ancient Egyptian temple sits within a modern European museum.

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

Remarkably preserved body discovered in a peat bog.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

Strange secondhand shop showcasing taxidermy and oddies

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

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

Incredible labyrinth of man made caves.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

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

A true Valhalla for cactus and succulent lovers.

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

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

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

This museum inside Amsterdam's largest cemetery explores how people deal with death.

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

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.