Mysteries of the Abandoned Season 13 poster

Mysteries of the Abandoned Season 13

12 Episodes First aired Feb 11, 2026

Documentary series investigating why some of the world's most advanced architectural achievements were abandoned.

Episodes

E1
1. Blood Wedding
Feb 11, 2026

A serene institution in the American Midwest, seized in righteous anger, a subterranean lair in France designed with a disturbing objective, a Spanish settlement concealing a story of forbidden love and ruthless…

E2
2. The Island of No Return
Feb 11, 2026

In New Jersey, a symbol of American pride and dominance; a top-secret site in Japan used for wartime missions of no return, an Italian town, whose residents were given lethal advice by government officials.

E3
3. The Beer Riot
Feb 18, 2026

A compound in Seattle linked to a high-profile military scandal, a concrete shell in London that fell victim to the city’s largest explosion, a Wisconsin farmstead known for its brewing history, and a hilltop stronghold…

E4
4. Do-Over Ranch
Feb 18, 2026

Revisit an isolated Peruvian prison where a notorious riot took place and see a revolutionary sanctuary in a Las Vegas park. Learn how a Paris monument became a labor nightmare, then investigate a Sicilian paradise lost…

E5
5. D-Day Castle
Feb 25, 2026

Unearth a wartime nerve center in Dover that made the UK proud, then visit a mansion caught in the crosshairs of the Civil War. Dig up an Estonian ruin's connection to Catherine the Great and explore the arena where Joe…

E6
6. Japan's Poison Island
Feb 25, 2026

An investigation centres on a New Jersey racetrack run by a notorious gang, a destructive legacy on a remote Japanese island, a Soviet bunker for a Lithuanian takeover and the pivotal facility that launched Motown's top…

E7
7. The Nazis' Last Stand
Mar 4, 2026

Nazi towers in Berlin, defended to the bitter end by child soldiers; a Chicago institution, once the largest of its kind in the world; an eccentric vision in the Malaysian jungle; and a complex in San Francisco, born…

E8
8. Agent Zigzag
Mar 4, 2026

An iconic Philadelphia venue that set the stage for era-defining artists; a French compound, where a staggering deception was launched; and a Malaysian mansion, the scene of a baffling crime.

E9
9. Cold War Cover-Up
Mar 11, 2026

In Michigan, a top-secret military base embroiled in an unexplained disappearance; an Italian wonderland, shattered by links to the Mafia; a California transportation hub that inspired lasting change; and a Croatian…

E10
10. The Invisible Enemy
Mar 18, 2026 · 42m

Inspect a Scottish site that became a military flashpoint; an Oklahoma ruin where Native American cultural genocide took place; look inside a crumbling Greek house of horrors and an Oregon military facility that once…

E11
11. Fort Traitor
Mar 25, 2026 · 42m

Look at a New Jersey complex that once housed a military lab targeted by Soviet spies; examine a scarred Welsh coastline exploited for building materials; trek to a Greek WWII disaster site and a Peruvian palace with a…

E12
12. Churchill's Shadow War
Mar 25, 2026 · 42m

A London tunnel complex from World War II and a New Jersey aviation disaster site are explored; the tour includes a former English industrial center and an Italian forest with unmarked graves.