Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.

The stunning interior of this Gothic church is covered in ornate gold details.

Off-limits and full of venomous pit vipers, Brazil’s Snake Island has a frighteningly apt nickname.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

A medieval castle in the middle of rural Texas.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

A castle built by an eccentric medieval enthusiast in rural Ohio.

An eccentric inventor's castle home with its own indoor weather system.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The private clubhouse for the members of the Academy of Magical Arts.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

A mysterious castle built as a monument to lost love.

The surviving remnants of a destroyed medieval church now stand in a public park.

A medieval church built into an ancient cave.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

A perfectly preserved abandoned criminal asylum in South Australia.

Cannon designed to fire an atomic warhead.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

If astronomy had a ghost, it would look like this observatory.