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 ten most significant. Stories: 10) Presidential Compound, Democratic Republic of the Congo; 9) Hellfire Caves, Buckinghamshire; 8) Villa Guardamangia, Valletta, Malta; 7) National School of Art, Havana, Cuba; 6) Constitution Hill, Johannesburg, South Africa; 5) Oakland Auditorium, Oakland, CA; 4) Eastern State Penitentiary, Philadelphia, Pennsylvania, USA; 3) Maestranza de San Bernardo, Santiago, Chile; 2) Fordlandia, Para, Brazil; 1) Nazi Party Rally Grounds, Nuremberg, Germany
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. Stories: 1) Taman Festival, Bali, Indonesia; 2) Fort Eben-Emael, Bassenge, Belgium; 3) Greenbrier Resort, West Virginia; 4) Palestinian Legislative Council, Abu Dis
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. Stories: 1) Malcha Mahal, Delhi, India; 2) Former USAF Base, Greenham Common, England; 3) Kempton Park Hospital, Johannesburg, South Africa; 4) Cumberland Island, Camden County, Georgia
Experts investigate the deadly legacy of an abandoned sea fort. Stories: 1) Peleliu, Palau, Western Pacific; 2) Fort Alexander, St. Petersburg, Russia; 3) Doftana Prison, Telega, Romania; 4) Puerto Cristal, Aysen, Chile
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. Stories: 1) Fort Jefferson, Dry Tortugas, Florida; 2) Bankya Residence, Sofia, Bulgaria; 3) Bunker Valentin, Bremen, Germany; 4) Cockatoo Island, Sydney, Australia
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. Stories: 1) St Peter's Seminary, Cardross, Scotland; 2) San Pietro Infine, Campania, Italy; 3) Krampnitz Cavalry School, Potsdam, Germany; 4) Chacabuco, Antofagasta, Chile
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. Stories: 1) Bethlehem Steel Plant, Bethlehem, Pennsylvania; 2) Lindisfarne Priory, Holy Island, England; 3) Mokrzyszów Palace, Poland; 4) Lifta, Israel
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. Stories: 1) Brooklyn Army Terminal, New York City, New York; 2) Armero, Colombia; 3) Crossness Pumping Station, London, England; 4) Petrova Gora, Croatia
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. Stories: 1) HMS Jackdaw, Fife, Scotland; 2) Costa del Croco, Tsentar, Bulgaria; 3) Sonnenberg Shelter, Lucerne, Switzerland; 4) Edinburgh Manor, Iowa, USA
The haunting remains of an isolated ghost town high in the Colorado mountains suggest a once booming mining community left in devastation; experts uncover an inhospitable land of shattered dreams where fortune seekers chased the American dream. Stories: 1) Animas Forks, San Juan County, Colorado; 2) Horse Sand Fort, The Solent, English Channel; 3) Aguirre Sugar Mill, Central Aguirre, Puerto Rico; 4) Foinikas, Paphos District, Cyprus
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. Stories: 1) Kinmen Island, Taiwan; 2) Kennecott Mining Town, Alaska; 3) Jarlshof Settlements, Shetland, Scotland; 4) Fortress Furggels, Pfafers, Switzerland