A facility on the Caribbean island of Montserrat becomes a magnet for music superstars; a strange ghost town in Georgia is constructed to host a dreadful dictator.

Haludovo Palace Hotel in Croatia; Wolf's Lair, a German military complex; and Herouni Mirror Radio Telescope, a pioneering facility in Armenia are all explored this time.

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.

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This time we visit Dover Commando Fortress in South East England, where traces of a top-secret Commando raid are still visible.

We explore Old Byron Hot Springs in the Californian desert, a once glittering Hollywood hotspot, converted into a top-secret interrogation centre.

Explores a work of national pride that became a symbol of excessiveness in the Turkish capital of Ankara.

This time we look at Yongma Land, a South Korean dreamland given a second life from the most unlikely of places.

Old Joliet Prison, a battered facility near Chicago that descended into open war, is explored this time. Its reputation now persists because it hosted the Blues Brothers.