A curiously designed, windowless building adorned with gold-tinted diamond shapes now stands derelict in Tulsa; experts investigate and uncover a controversial religious figure and the headquarters behind a pioneering form of American TV evangelism.

An eye-catching collection of graffiti-covered structures that were once a pioneering entertainment attraction now stand derelict in the Mojave Desert; experts investigate and reveal the revolutionary remnants of America's first waterpark.

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.

A legendary U.S. Naval war vessel, the USS Hornet (CVS-12), now stands as a monument to space exploration in Alameda, California; experts reveal how the formidable WWII aircraft carrier served a vital role in historic Apollo spaceflight recovery missions.

Varosha, an entire city district of desolate streets and derelict buildings in Famagusta, lies mysteriously untouched for decades in Eastern Cyprus; experts investigate and uncover a once opulent resort town suddenly entangled in the 1974 Turkish military invasion, Operation Atilla.

Houska Castle, an eerie castle with a supernatural attraction, stands derelict in the dense forests near Doksy in the Czech Republic; experts investigate and uncover legends of a concealed gateway to hell and links to horrific Nazi Germany occult experimentation.

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.

The Variety Theater, a once-majestic theater hosting entertainment for generations in lavish surroundings, now lies mysteriously derelict in Cleveland, Ohio. Experts investigate a record-breaking heavy metal concert performed by Motorhead on December 2, 1984, that would spell the theater's eventual downfall. With a sound level of 130 decibels, this was the loudest rock performance ever recorded. 

A series of dark, subterranean vaults lie hidden beneath the bustling streets of Edinburgh, Scotland; experts investigate and uncover a vast network of tunnels and chambers that contain a history of opportunity, crime, and destitution.

The remains of a derelict industrial complex connected to a mysterious water canal lie deserted in the Florida Everglades; experts investigate the Aerojet Dade Rocket Facility, an abandoned solid-fuel rocket testing facility critical to humanity's race to the stars.

A forgotten military fortification connected to a network of secret tunnels are mysteriously hidden within the Rock of Gibraltar; experts investigate and uncover a derelict war-torn complex constructed for a highly classified WWII spy operation.

The remnants of a desolate ghost town with a violent past, Agdam, lie in the shadow of the Caucasus Mountains in Azerbaijan; experts investigate and uncover a destructive ethnic and territorial conflict, the Nagorno-Karabakh Conflict, that forced the evacuation of the entire city.

The ruins of a mental health institution, Hartwood Hospital in North Lanarkshire, lie deserted in the Scottish woodlands; experts investigate and uncover the terrifying past of a notorious psychiatric asylum where many entered, but few escaped.

A research complex housing two enormous satellites is now mysteriously derelict in the rural expanse of Woodbury, Ga.; experts investigate and uncover the Woodbury Research Facility, where planetary scientists explored possible evidence of extraterrestrial intelligence.

An opulent chateau perched in the middle of a lake, the Château de la Mothe-Chandeniers, 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.

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.

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

The ruins of a coastal fortress sit atop a jagged outcrop along the beaches of Wales - St Catherine's Fort and Island in Pembrokeshire. Experts investigate and uncover a derelict 19th-century British fortification that housed a series of occupants, including an exotic, private zoo.

The sprawling ruins of a once lavish destination are now mysteriously deserted in the mountains of Romania. Experts investigate and uncover the remains of the Herculane Spa, a luxurious spa resort and royal retreat entangled in a web of corruption.

A majestic vacation estate for the rich and powerful now lies abandoned in the highlands of Argentina - the Hotel Edén in Córdoba Province. Experts investigate and uncover a once struggling hotel transformed into a luxurious resort outpost for elite Nazi German sympathizers. 

Experts investigate how a ruinous financial crisis combined with murder mystery schemes caused the decline of the Sathorn Unique Tower, an opulent skyscraper in the heart of Bangkok's busy streets, a structure now little more than an empty shell.

A looming skyscraper, Ponte City, once an exclusive residential complex, turns into a dystopian ruin in Johannesburg, South Africa; experts investigate and uncover a symbolic structure of urban decay under the shameful shadow of apartheid.

An enormous war machine, the  KM (Korabl Maket), known colloquially as the Caspian Sea Monster, 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 bizarre remnants of a housing complex lie mysteriously deserted in the Ohio industrial town of Campbell. Experts investigate and uncover the dark, turbulent past of the oppressive steel firm Youngstown Sheet & Tube Company and the labor strikes that resulted in deadly riots in 1916.