The haunting remains of a World War I fort perched atop a mountain.

A crash site in the heart of polar bear territory has become a beloved local landmark.

Built in 1547, these ruins lie on a rocky promontory in Ballintoy jutting into the wild ocean waters below.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

The FBI's urban training course may have the highest fake crime rate in the world.

On a trail in Portugal's Barão de São João National Forest, a pile of faces look up at hikers from the forest floor.

Perhaps the most spectacular grotto along the Algarve coastline.

An honorary saint of the people, Maria Adelaide became an incorrupt corpse, the clothes intact, exhaling “a strong scent of roses.”

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

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

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The farthest you can be in the contiguous U.S. from a McDonald's location.

Where mountaineers were checked for lice before entering the city.

Climb right into the heart of this colorful Iceland volcano.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.