Pennsylvanian mass grave and possibly mass murder.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An abandoned stretch of highway, deteriorating next to the operational one.

Thousands of well-dressed mummies below a monastery.

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

An abandoned castle owned and ignored by Masons carries a cursed history.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

Fantastic stories on a miniature railroad.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

A miniature train-ride through Slovenia's largest cave system.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This massive subterranean fissure is known as the "underground Grand Canyon."

A whimsical bridge adorned with decorative dragons.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.