South Korea's only sex-themed park.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

A bright and wacky exhibit answers every question you may have had about human excrement, flatulence, and more.

Secret North Korean passage discovered below the world's most dangerous border.

Over a decade ago, painted penguins mysteriously appeared around Berwick-upon-Tweed for no apparent reason.

This small red school was where Germany signed their surrender during WWII.

Longest canal tunnel in the world, abandoned in the 1960s.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

For those late-night mollusk cravings.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

Fighting the British and making game shows for over 150 years.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

This ancient theater was once the home of fierce gladiatorial battles.