In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

A mysterious concrete hand reaches out from between the stones of Uniwersytecki bridge.

Relive a Polish uprising via an enormous, century-old cyclorama.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

The silly symbol for an underground protest group is now scattered around the city.

A striking public sculpture representing the period of martial law in Communist Poland.

A collection of old neon signs from all over Poland line a secluded courtyard.

This massive blockhead sculpture hides an entire library.

This saucy statue once caused outrage among locals.

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

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

The location of this small park was once the site of an infamous public morgue.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

Marvel at the opulent Art Nouveau interior while dining on dirt-cheap French classics.

A mechanized clock where a man fights off a dragon, crab, and rooster.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

This 400-year-old tree is actually an immigrant from North America.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

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

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

The Argonaute submarine was the French navy's pride and joy in the 1950's.

This bridge was constructed from the rubble of the infamous Bastille.