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.

A pillar is all that remains of a church built to honor a peculiar miracle.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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

A lovely biographical museum in the artist's home of 24 years.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Climb inside an iron crystal magnified 165 billion times its normal size.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

A fortified palace in the shape of a ship on the Thiou river.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

The celebrated eyesore created by starry-eyed sweethearts.

Designed by Gustave Eiffel before his famed tower.

Kissing the ass of this stone lioness has become a rite of passage in the city of Girona.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

An early 20th-century bullring converted into a modern shopping center.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.