An eerie, derelict amusement park in Berlin.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

The site of the first battle of World War II.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

This tower in a small Polish village uses the power of a sacred bell to ward off mischievous weather spirits.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Striking occult iconography on a medieval German church.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A slice of central Asia in the middle of Berlin.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

The final resting place of a famous 19th-century murder victim whose identity is still a mystery.

An abandoned 19th-century iron factory perched along the outskirts of an idyllic village.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

The world's newest astronomical clock is also its most accurate.