A medieval church built into an ancient cave.

Where the rules of that most quintessentially English game were first devised by an eccentric inventor.

Puzzles within puzzles hide a golden treasure in this hedge maze.

This was once the center of the Birdman cult, and is now a World Heritage Site.

This unique Renaissance castle was turned into a home for Nazi occultism.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

This South Pacific volcano has been blowing its stack for over 800 years and is said to be home to a cult leader waiting to be reborn.

Plains of ash and pair of semi-active volcanoes contribute to the otherworldly beauty of this little-known Vanuatu island.

The fully functional, submerged Vanuatu Post Office is definitely one of a kind.

One of the greatest maze designer’s greatest mazes.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

An ancient stone fortress considered by many to be the eighth wonder of the world.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

One man's ambition created this psychedelic log home.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

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

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

The Man In Black grew up in a large agrarian community established by the federal government in the Great Depression.

An astounding annual light display honors the victims of one of Japan's most devastating earthquakes.

The winter home of millions of migrating monarch butterflies.

The crypts are so large they're basically their own underground church.

A rotating cast of guys and dolls in front of a Washington, D.C. building.