Where in the fuck are these snow dunes?

Sage Kotsenberg posted these videos of him and Ben Ferguson shredding these sick ass snow dunes in what appears to be Death Valley but with snow. Antarctica maybe? I don’t know but wherever they are I want to fucking rip them. Think about how fun it would be to dick around in there with a sled, a rope and some skis. Just to like hike up and ski down looks alright but If I could get towed by a sled and fucking send it off that dune? Oh boy that would be awesome. Or just fucking send that shit on a sled. You could take that pony fuckin deep on these bad larrys.