Live Science37m
'We didn't know what it was at first.' NASA aircraft uncovers site of secret Cold War nuclear missile tunnels under Greenland ice sheet
As it turns out, this abandoned "secret city" was the site of a secret Cold War project known as Project Iceworm which called ...
Bored Panda on MSN16m
NASA Finds Secret Underground “City” Hidden From The World Under 100 Feet Of Ice And Snow
NASA scientists unearthed an astonishing man-made spectacle, lying frozen 100 feet below the surface and frozen in secrecy ...