An abandoned colonial French prison notorious for its hellish conditions.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

The now-overgrown beach resort was once frequented by Yugoslav military elite.

Clusters of abandoned buildings hint at the facility's 144-year history with psychiatric health.

The abandoned tuberculosis sanatorium is said to be one of the most haunted places in Canada.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."

This airstrip atoll is uninhabited by humans, but absolutely full of birds.

Scattered ruins and a tiny cemetery are all that remain of a failed attempt to colonize the inhospitable Desolate Islands.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

A long-abandoned provincial prison left to crumble in the frigid air of Ontario.

An ancient city hidden in the heart of the Sierra Nevada mountains.

The old fire tower is one of the last of its kind in the United States.

This old abandoned sign flickers to announce a motel that isn't even there.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

This abandoned orphanage-turned-asylum witnessed a terrible chapter in Québec's history.

A crumbling mountain resort that looks like it was abandoned in an instant.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

This isolated airport in the middle of the Everglades sees more alligators than planes.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

Now abandoned, this stone church was part of the missionary efforts that initiated the Christianization of Zambia.

A little-visited ghost town state park offers a glimpse into Montana’s "Silver Queen."