Europe's second largest ossuary wasn't discovered until 2001.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

Countless grotesque faces stare out from this eerie Prague art wall.

This automated sculpture of two men peeing will spell out text messages with their micturition.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

No one knows who built this strange cave of worship or exactly why.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Religious structure known for its sculpted details.

Romania's only crater lake with water as pure as if distilled.

A little church on a tiny island looks like something from a fairy tale.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A century-old shot ball factory tower is open to the public once a year.

This TV tower once secretly housed a GDR intelligence team.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

A collection of abandoned typographic signs from Berlin and beyond.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Specimens collected by the author of "Lolita" and self-taught lepidopterist are exhibited in his childhood home.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

Palace where the nearly un-killable Rasputin was murdered.