A volcanic island just off Taiwan containing chilling ruins from its darkest era, a strange site filled with rusting metal cages and a miniature railway that lies forgotten in the woods of Arkansas USA, an Eastern European town that lived through a radioactive nightmare, and a United States Air Force base in Britain with a top-secret agenda.

Bizarrely-shaped huts in India, once home to global superstars, are now eerily quiet and neglected. Also, traces of a legendary escape story hidden beneath a Polish forest, epic castles in Transylvania telling a chilling story of the world's most notorious villain, and a shattered compound in Colombia linked to a criminal mastermind.