"I have heard that Greenland has minerals like crazy under the ice cap"
You can even dig for old buried WWII planes.
"Many of you most likely know this story already, but the P-38 Glacier Girl was one of six P-38s and two B-17s that had to make an emergency landing on an icecap in Greenland on July 15th, 1942 due to inclement weather. The crews were collected unharmed and the 8 planes were left there to be eventually covered by snow and ice."
full article with many pictures