This ancient Corinthian helmet is South Korea’s only national treasure of Western origin.

The site where the Emperor of Korea performed the long-forbidden "rite of heaven" to demonstrate his absolute sovereignty.

Only a few pieces remain of a grand 16th-century water clock that once announced the changing hours with the sound of bells, gongs, and drums.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Paris' linguistic guide to the international language of, yes, love.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

The location of the world's first telescope demonstration.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Terrifying derelict military hospital once housed a recuperating Hitler.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

An impressive monument to Poland's independence.

A cluster of headless, armless sculptures looms within a popular Polish park.

An abstract and eyecatching clock/fountain is the centerpiece of this little-known German city.

The first, and perhaps only, monument dedicated to Wikipedia.

This towering statue of Jesus provided internet to the surrounding area.

Learn the fine art of making a centuries-old treat at this hands-on food museum.

This grubby wall is said to be one of the Earth's esoteric energy centers.

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

This museum houses and extensive collection of technology contributed by the Polish people.