A Polish castle becomes entwined in the hunt for lost Nazi treasure, the heir of an American business tycoon gets caught in a web of controversy and an Irish estate is embroiled in a fight for freedom.

A place of hope in the Czech Republic quietly perseveres in the age of Nazi tyranny, a Moroccan politician sides with the French and an eco-friendly paradise in the Amazon proves to be unsustainable.

An underground labyrinth can warp the mind and turn friend into foe.

In modern-day Turkey, on the coast of the Aegean Sea, archaeologists discovered hilltop ruins that are believed to be the site of one of the world's most enduring stories.

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.

This spooky, unfinished amusement park serves a different purpose nowadays.

Some of the world's most incredible engineering projects are now deserted; Explore what happened to a cutting-edge research complex built by a visionary genius, an ambitious Nazi project that met a sinister end, and a Cold War relic that changed history.

In a California desert, a once glittering Hollywood hotspot gets converted into a top-secret interrogation center for POWs.

Abandoned engineering projects include a classified Soviet machine built to prevent all-out nuclear war, a top-secret Nazi facility, and a strange tower that left an enduring legacy.

Half-built castles stand as a whimsical reminder of a neighborhood that was supposed to feature thermal baths and panoramic views; the ambitious project came to an abrupt halt when the construction company began to face financial difficulties...

The series about abandoned engineering achievements begins with a Soviet megastructure, massive Nazi brainwashing complex and dangerous desert pass.

Exploring what happened to the large town just outside of Chernobyl on the eve of disaster, a fleet of ghost ships, and a dangerous mountain road that changed history.

An abandoned theme park is home to secrets of a forgotten, imaginary world.

Experts reveal 10 of the world's most iconic abandoned places.

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.

Graffiti scratched into the walls of a military base on the British coast sheds light on a secret raid against the Nazis.

Exploring a ghost town that was once a dangerous industrial hellscape, a giant warship at the bottom of the ocean, and a top-secret relic that could have changed the Cold War.

Stories of incredible engineering projects that are now deserted, including a massive military site that was once a hotbed for nuclear testing, a top-secret airbase hidden inside a mountain, and an otherworldly power plant.

The ruins of a historic Scottish castle is now a bewitching wilderness of hidden dangers with deadly booby traps obscured afoot; experts and historians reveal a bygone Second World War military hospital with bizarre ties to an infamous Nazi occupant.

A collection of ramshackle structures with a mystical facade lie mysteriously deserted on the tropical island of Bali; experts investigate and uncover the ruins of a bizarre amusement park complex with a disastrous past.

A war-torn Italian ghost town immortalized by a legendary Hollywood director blurs the lines between fiction and reality; experts investigate and uncover a forgotten landscape of ruins captured in a WWII documentary.

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 porn baron dreams up a hedonistic paradise to avert nuclear catastrophe.

A Beatles legend builds a state-of-the-art studio on a Caribbean island.