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.

Remnants of a cone-shaped Nazi bomb shelter.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

India's first open-air public art district sits in the heart of the country's capital.

Sweden's "good old days" painstakingly re-created in a model village.

The video game-themed street art first popped up in the French city.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

How did a French journalist’s grave become the sexiest statue in the cemetery?

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

Indents in the pavement are all that remain from a grisly death machine in Paris.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

Single runway interrupted by a busy road that cuts across its middle.

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Dead weights honor the dead of Portugal's fishing industry.

The final resting place of the great navigator, or maybe his brother.

An eerie collection of the surviving structures from a past celebration of the future.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.