5 Buried Beneath Arctic Ice, a Secretive Underground Military Base Emerges in New Radar Images (thedebrief.org) posted 24 days ago by Questionable 24 days ago by Questionable +5 / -0 “We Didn’t Know What It Was at First.” Buried Beneath Arctic Ice, a Secretive Underground Military Base Emerges in New Radar Ima... Long buried beneath arctic ice in Greenland, a forgotten relic of the Cold War has been rediscovered in new NASA radar images. 3 comments share 3 comments share save hide report block hide replies
There was a huge string of advanced warning radar sites strung across northern Canada in the early Cold War, in case Russian bombers flew over the arctic to nuke the US.
As radar tech advanced, they were no longer necessary, and were abandoned.
It was called the DEW Line: https://en.wikipedia.org/wiki/Distant_Early_Warning_Line