From a long lost US base beneath the Arctic ice cap, to a sunken Soviet submarine, the Cold War's toxic legacy is both fascinating and terrifying.

How in 1959, during the heat of the Cold War, the government of the United States decided to create a secret military base located in the far north of Greenland: Camp Century, almost a real town with roads and houses, a nuclear plant to provide power and silos to house missiles aimed at the Soviet Union.