Well-preserved ruins in the Pine Grove Hills of western Nevada.

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

All that remains of this former mill town is a ranger station and some crumbling buildings.

This maximum-security prison was abandoned to make way for a national park.

In this pristine Ecuadorian hippie town, residents remain active well into their eighties and nineties.

A moody and picturesque riverside ruin overgrown with vegetation.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

A notoriously corrupt Chief of Police's deteriorating Greek-themed playhouse.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

These unusual stone structures are actually fish traps crafted by an ancient civilization.

Asbestos pit mine abandoned in 1983 is still dangerous thirty years later.

Once the largest rope factory in Greece, this abandoned plant now stands like a ghost of industry past.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

A mausoleum dedicated to a warrior felled by misplaced loyalty and tragic circumstances.

This surprising museum tells the story of modern Malaysia through the history of its law enforcement.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

One of the oldest and largest castles in the world.

A 1,500-year-old ghost settlement is slowly fading away.