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An enormous concrete box with bizarre circular openings looms on the coast of an island near mainland China; experts investigate and uncover tunnels leading to an enormous underground complex that nearly triggered a nuclear war.

Mysteries of the Abandoned

Chinese Nuclear Box

The haunting remains of an isolated ghost town high in the Colorado mountains suggests a once booming mining community left in devastation; experts uncover an inhospitable land of shattered dreams where fortune seekers chased the American dream.

Ghosts of Mount Fortune

A derelict beachside resort along the Black Sea is constructed upon deception and deep connections to the criminal underworld; experts investigate and uncover dark secrets behind a sprawling holiday complex constructed by the Russian mafia.

Russian Mafia Resort

A breathtaking stainless steel tower seems otherworldly and out of place in the remote mountain forests of Croatia; experts investigate and uncover a dark past of Nazi-led conflict and a monument to a desperate fight for survival.

Alien Ghost Tower

The ruins of a dreamlike Polish palace hide an astonishingly dark history that's shrouded in mystery to this day; experts investigate and uncover an ornate gothic structure that concealed a nightmare of Nazi experimentation.

Hitler's Nightmare Palace

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.

Hollywood vs. Nazis

A desert island adrift in the Gulf of Mexico contains a massive and marooned structure with a contagious past; experts investigate and uncover a desolate military fortress turned prison and plagued by a deadly disease.

Florida Death Fortress

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

Plague on Hell Island

Long, dome-like structures camouflaged by a rural landscape conceal the remains of concrete vaults with a hidden history; experts investigate and uncover state-of-the-art bunkers built to conceal and protect a deadly nuclear secret.

Fortress of Nuclear Secrets

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.

Ruins of Disaster Park

The world's abandoned structures hold new evidence about the lives and deeds of history's greatest heroes and villains and using the latest discoveries at these mysterious sites, experts count down the 10 most significant ones.

The Good, the Bad, and the Abandoned

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Some of the biggest engineering projects that lie in ruins; cities that are empty ghost towns, bridges that were never finished and roads to nowhere; these deserted places are home to many mysteries and untold secrets.

S8 E10 | Hitler's Nightmare Palace