Isaac Newton's former home, where the famous apple tree still stands.

Six turbines towering over a wide road for passersby.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

A Museum of Psychiatry in a still-operating mental institution.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A historic observatory precariously perched at the "Top of Europe."

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Amsterdam's former hotspot for public executions and dissections.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

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

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

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

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

A rare example of World War I trenches from the British front.