Project Iceworm
During the Icy War, the US military tried to keep things cold and secret via Project Iceworm. The goal was to bury nuclear weapons deep underground in order to create a covert nuclear launch point in the freezing north from which to launch an assault against the Soviets if necessary. By using the tunnels beneath the ice for this purpose, the US could launch nuclear bombs into the Soviet Union at the same time, while shifting missiles so often that the Soviet Union was nearly impossible to defend or attack precise missile placement.
Camp Century was supposed to be a settlement beneath Greenland's ice. It would hold 600 nuclear weapons as well as 200 soldiers under the pretext of a polar research outpost. The missile silos would be linked underneath by rail cars, allowing them to move anywhere across 52,000 square miles at any time.
The Pentagon eventually abandoned the plan, but not before much infrastructure had been constructed. The changing ice of Greenland made the place unpredictable and perilous. The military abandoned 9,2000 tons of equipment, as well as 53,000 liters of fuel and hazardous waste.
Year of Experiment: between 1960 and 1962