A formerly luxurious and strategic mountain-top villa on the island of Rhodes in the Mediterranean that's been ravaged by acts of revenge by locals since 1955. A structure covered in symbols and signs that spirals down into the depths of the unknown. The rust covered carcass of a vast industrial relic deep in the woods of West Virginia, and lone towers battling the might of the ocean at the ends of the earth. But how and why were they ever built, and why are they now left abandoned?

Once they were at the heart of the Communist empire, now they lie abandoned leaving only memories of a time before the fall of the Berlin Wall. Now, each haunted shell is ready to reveal its own story.

Still standing today, a fierce-looking prison and an innocuous looking office building in Berlin were actually the headquarters of a feared and ruthless organisation - the Stazi. Also, a covert Communist base hid Cold War submarines for Tito, the former leader of Yugoslavia on the island of Vis. A seemingly innocuous sports centre hides a sinister underground bunker.

And the former HQ of the Soviet Army in East Germany was a forbidden Soviet city within a city - the vast site in the East of Berlin is still abandoned today but its architecture still impresses and even the statues of Lenin still stand in this visually remarkable, place from another time.