Eighty million natural history specimens call this gargantuan museum home.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

From battleships to Roman vessels, this museum explores the depths of shipwrecks in the region.

A naturally mummified 2,000-year-old man.

Collection dedicated to brands, packaging and advertising.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

This early 19th-century graveyard is the final resting place of Vincent van Gogh's mother.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

A spherical "micro-nation" in the heart of Vienna.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

This small chapel is built of human bones and decorated with a golden skeleton.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

King Carlos IV laid the first stone during construction of this chapel.

These ancient artifacts are a testament to the enduring significance of the bull in Spanish culture.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.