A majestic estate for the rich and powerful now lies abandoned in the highlands of Argentina; experts investigate and uncover a once struggling hotel that was transformed into a luxurious resort outpost for elite Nazi German sympathizers.

The ruins of a coastal fortress sit atop a jagged outcrop along the beaches of Wales; experts investigate and uncover a derelict 19th-century British fortification that housed a series of occupants, including an exotic, private zoo.

Ruins of an imposing mental health institution lie deserted in Scotland.

An entire city district of desolate streets and derelict buildings lies mysteriously untouched for decades in Eastern Cyprus; experts investigate and uncover a once opulent resort town suddenly entangled in a Turkish military invasion.

A residential complex turns into a dystopian ruin in South Africa.

An eerie ghost village in west-central France, Oradour-sur-Glane, appears as if it were mysteriously abandoned and destroyed all at once; experts investigate and uncover the remains of a derelict settlement left as a memorial to a murderous WWII Nazi raid.

Subterranean vaults lie hidden beneath the streets of Edinburgh, Scotland.

A once majestic theater now lies mysteriously derelict in Cleveland.

The bizarre remains of an Old West mining town lie mysteriously deserted high in the mountains of Maggie Valley, North Carolina; experts investigate and discover an abandoned ghost town theme park that some local residents believe carries a curse.

A castle with an eerie attraction stands derelict in the Czech Republic.

A legendary US Naval war vessel now stands as a monument to space exploration in Alameda, California; experts investigate and reveal how a formidable WWII aircraft carrier served a vital roll in historic Apollo spaceflight recovery missions.

The bizarre remnants of a housing complex lie mysteriously deserted in an Ohio industrial town; experts investigate and uncover the dark, turbulent past of an oppressive steel company and labor strikes that resulted in deadly riots.

An enormous war machine lies stranded in a coastal grave along the beaches of Dagestan, Russia; experts investigate and uncover the ruins of an experimental Soviet ground-effect vehicle designed to strike fear in Western governments during the Cold War.

The ruins of a once lavish destination are now deserted in Romania.

An opulent chateau perched in the middle of a lake now stands dilapidated in the Loire Valley of France; experts investigate and uncover the remains of a festering palace whose owner was labeled a traitor by France's most notorious king.

A forgotten military fortification lies hidden in the Rock of Gibraltar.

The remains of rocket testing facility lie in the Florida Everglades.

A cluster of military defensive structures among a quaint holiday village lie deserted on a San Francisco Bay island; experts investigate and uncover a mysterious Civil War outpost that conceals a dark and hellish history...

A luxurious skyscraper in Bangkok is now an eerily derelict ghost tower.

A facility housing two enormous satellites stands derelict in Georgia.

The remnants of a desolate ghost town are uncovered in Azerbaijan.

A disintegrating tower once a thriving cultural hub now stands hollow and derelict in Monrovia, Liberia; experts investigate and uncover a landmark skyscraper left to decay in the wake of a bloody political coup.