Quest for Power: Hear about the disused structures that were once at the forefront of power supply, including Budapest's Kelenfold Power Station and New York's Wardenclyffe Tower. [S,AD]
Roads to Nowhere: Hear how a crumbling hill in the Peak District and dunes in California caused the closure of two roads. Learn why a route used by the French Resistance shut in 2003. [S,AD]
Roads to Nowhere: Hear how a crumbling hill in the Peak District and dunes in California caused the closure of two roads. Learn why a route used by the French Resistance shut in 2003. [S,AD]
Sabotage in the Mountains: The remarkable projects include a towering structure with an explosive past, a deserted cityscape, a mysterious top-secret facility and a vast Nazi construction. [S,AD]
Germany's D-Day Fortress: A devastated cliff-top ruin, an extraordinary tall tower, a concrete structure stranded at sea and a heavy metal monster in a field all feature. [S,AD]
Rock 'N' Roll Island: Exploring Air Studios, on the Island of Montserrat, that became a mecca for rock legends. Also Tskaltubo, in Georgia, built to host a fearsome dictator. [S,AD]
Penthouse Palace: Exploring Haludovo Palace Hotel in Croatia, Wolf's Lair, a German military complex and Herouni Mirror Radio Telescope - a pioneering facility in Armenia. [S,AD]
Hitler's Army Powerhouse: Hear how the Politz synthetic fuel plant in Poland, now a derelict site, was once central to Nazi Germany's drive to become self-sufficient on fuel. [S,AD]
Britain's Sea Fort Complex: Seven huge steel boxes stand rusting in the Thames Estuary. Hear how the Red Sands sea fort was once Britain's first line of defence against the Nazis. [S,AD]
Britain's Sea Fort Complex: Seven huge steel boxes stand rusting in the Thames Estuary. Hear how the Red Sands sea fort was once Britain's first line of defence against the Nazis. [S,AD]
Rock 'N' Roll Island: Exploring Air Studios, on the Island of Montserrat, that became a mecca for rock legends. Also Tskaltubo, in Georgia, built to host a fearsome dictator. [S,AD]
Penthouse Palace: Exploring Haludovo Palace Hotel in Croatia, Wolf's Lair, a German military complex and Herouni Mirror Radio Telescope - a pioneering facility in Armenia. [S,AD]
Castle Kingdom: Exploring a theme park in Buenos Aires built in a time of terror and dogged by controversy, and a jaw-dropping collection of castles in Turkey. [S,AD]
The Italian Dam Disaster: Hear the fateful story of the disused Vajont Dam in Italy, the site of a tragic disaster in 1963 which resulted in the deaths of around 2,000 people. [S,AD]
Battle of Britain Technology Facility: Learn about the strange-looking, derelict military facilities in Farnborough, which were once wind tunnels that played a vital role in WWII. [S,AD]
Battle of Britain Technology Facility: Learn about the strange-looking, derelict military facilities in Farnborough, which were once wind tunnels that played a vital role in WWII. [S,AD]
Castle Kingdom: Exploring a theme park in Buenos Aires built in a time of terror and dogged by controversy, and a jaw-dropping collection of castles in Turkey. [S,AD]
The True Cross: Exploring Old Byron Hot Springs in the Californian desert - a once glittering Hollywood hotspot, converted into a top-secret interrogation centre. [S,AD]
The Abandoned Nazi Railway: The Canfranc Railway Station is a large and elaborate abandoned Nazi railway station in the Spanish Pyrenees. Why was it built? [S,AD]
America's Jungle City: Henry Ford's Fordlandia Rubber Town has been left to rot in the Amazon Rainforest, but it was once a symbol of the American dream. [S,AD]
America's Jungle City: Henry Ford's Fordlandia Rubber Town has been left to rot in the Amazon Rainforest, but it was once a symbol of the American dream. [S,AD]
The True Cross: Exploring Old Byron Hot Springs in the Californian desert - a once glittering Hollywood hotspot, converted into a top-secret interrogation centre. [S,AD]
Germany's Lost Warship: The Georg Thiele was a technological masterpiece, but now it is a shipwreck, lost to the sea after running aground during a naval battle in WWII. [S,AD]
Lost Highway In The Rainforest: Hidden in the Brazilian jungle is the Petrobras Viaduct, an extraordinary highway that seemingly leads nowhere. Who built it and why? [S,AD]
Lost Highway In The Rainforest: Hidden in the Brazilian jungle is the Petrobras Viaduct, an extraordinary highway that seemingly leads nowhere. Who built it and why? [S,AD]
Ghost Ships: Hear about some once-great triumphs of marine engineering, now left to rust. A ship graveyard in Maryland has been colonised by wildlife. We go inside a Cold War sub. [S,AD]
Ghost Ships: Hear about some once-great triumphs of marine engineering, now left to rust. A ship graveyard in Maryland has been colonised by wildlife. We go inside a Cold War sub. [S,AD]
Lost Bridges: Hear about some magnificent bridges that time forgot. A hurricane put paid to Goat Canyon Trestle in California, while Kinzua Viaduct was destroyed by a tornado. [S,AD]
Mission: Space: The eerie world of abandoned Space Age projects. What became of the HARP gun in Barbados and the mountainside Barcroft Observatory in California? Find out today. [S,AD]
Mission: Space: The eerie world of abandoned Space Age projects. What became of the HARP gun in Barbados and the mountainside Barcroft Observatory in California? Find out today. [S,AD]
Silent Cities: What is left behind when urban areas are abandoned? Hear about some remarkable ghost towns, including Pripyat - frozen in time after Chernobyl - and Hashima Island. [S,AD]
The True Cross: Exploring Old Byron Hot Springs in the Californian desert - a once glittering Hollywood hotspot, converted into a top-secret interrogation centre. [S,AD]
Castle Kingdom: Exploring a theme park in Buenos Aires built in a time of terror and dogged by controversy, and a jaw-dropping collection of castles in Turkey. [S,AD]
Lost Highway In The Rainforest: Hidden in the Brazilian jungle is the Petrobras Viaduct, an extraordinary highway that seemingly leads nowhere. Who built it and why? [S,AD]
Germany's Lost Warship: The Georg Thiele was a technological masterpiece, but now it is a shipwreck, lost to the sea after running aground during a naval battle in WWII. [S,AD]
America's Jungle City: Henry Ford's Fordlandia Rubber Town has been left to rot in the Amazon Rainforest, but it was once a symbol of the American dream. [S,AD]
Penthouse Palace: Exploring Haludovo Palace Hotel in Croatia, Wolf's Lair, a German military complex and Herouni Mirror Radio Telescope - a pioneering facility in Armenia. [S,AD]
Penthouse Palace: Exploring Haludovo Palace Hotel in Croatia, Wolf's Lair, a German military complex and Herouni Mirror Radio Telescope - a pioneering facility in Armenia. [S,AD]
Rock 'N' Roll Island: Exploring Air Studios, on the Island of Montserrat, that became a mecca for rock legends. Also Tskaltubo, in Georgia, built to host a fearsome dictator. [S,AD]
The Drop: Exploring the Dew Drop Inn in New Orleans, a music mecca that dared to take on the authorities and paid the price, and Belgica Fort, built to defend an unlikely treasure. [S,AD]
The Drop: Exploring the Dew Drop Inn in New Orleans, a music mecca that dared to take on the authorities and paid the price, and Belgica Fort, built to defend an unlikely treasure. [S,AD]
An American Exodus: Exploring a decrepit Liberian landmark with American origins, a desolate town in Belgium and a pioneering scientific structure in Cleveland. [S,AD]
Blitz Spirit: Exploring a grand structure in Hull that was reduced to rubble by Hitler's planes, Casa Albero in Italy, USS Hornet in California and the Sofia tunnels. [S,AD]
Blitz Spirit: Exploring a grand structure in Hull that was reduced to rubble by Hitler's planes, Casa Albero in Italy, USS Hornet in California and the Sofia tunnels. [S,AD]
Castle Of The Occult: Exploring a dense forest near the Czech capital of Prague that hides Houska Castle, an eerie castle rumoured to possess supernatural powers. [S,AD]
Castle Of The Occult: Exploring a dense forest near the Czech capital of Prague that hides Houska Castle, an eerie castle rumoured to possess supernatural powers. [S,AD]
Rock And Ruin: Exploring traces of a mass deception hidden at Ponte Dirillo in Italy, as well as a once lavish theatre in Ohio and an ancient city with a poisonous secret. [S,AD]
Cowboy Mountain: Exploring the remains of an ingenious sky-high solution to a ground-based problem, Chiatura, once know as the Venice of the air. [S,AD]
Cowboy Mountain: Exploring the remains of an ingenious sky-high solution to a ground-based problem, Chiatura, once know as the Venice of the air. [S,AD]
Ememy At The Gates: Exploring a series of vaults, hidden from view in Edinburgh, Scotland that tell a murky story of opportunity, crime and destitution. [S,AD]
Raiders & Invaders: Exploring Oradour-sur-Glane, a French town drenched in infamy. Also, Alcatraz, a facility famed for breakouts but also subjected to a daring break-in. [S,AD]
Niagara's Hidden Marvel: Exploring a royal retreat caught in a web of corruption, an engineering marvel hidden behind the Niagara Falls in Canada, and a subterranean treasure. [S,AD]
Niagara's Hidden Marvel: Exploring a royal retreat caught in a web of corruption, an engineering marvel hidden behind the Niagara Falls in Canada, and a subterranean treasure. [S,AD]
Treasures to Die For: Exploring Hartwood, a haunting facility in Scotland, ruins of an ancient city in Iraq and a scandal hit town in New Mexico. [S,AD]