It looks like someone found Thor's hammer—Mjölnir—and is trying to open portal from the world of the ice giants to Asgard. Or maybe it's just George X. Lin "having a bit of fun with steel wool" in a Icelandic ice cave.
It's a perfect image for this country, an incredible land full of ice and fire, glaciers and volcanos. "If there is only one way for me to describe Iceland, it would be Monumental Scale Shock," he says. Check out his article about Iceland here.