Organisms normally seen under a microscope decorate this church.

A Dutch museum preserves the world's most diverse collection of vertical slices of soil.

Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

This museum is filled with an eclectic collection of unique inventions.

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

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Remarkably preserved body discovered in a peat bog.

Home to the world's oldest functioning orrery.

This vast collection of smoking pipes from across the world spans centuries.

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

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

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

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

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

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

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.

A market built atop boats is one of the few floating holiday markets in Europe.

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

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

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

A unique collection of gilded age mechanical pianos.

This subterranean studio is filled with fascinating kinetic art.

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