https://www.flickr.com/photos/paradox_m/51187999200/in/photostream/
Glacier that winds like a mountain road.
It's the Aletsch Glacier in Switzerland. It's the largest glacier in the Alps.
The lowest elevation of the glacier is 1650 meters above sea level. The same as Denver, Colorado!
Could any vehicles of any kind (not just cars) theoretically use this road?
"The Aletsch Glacier is one of the many glaciers located between the cantons of Bern and Valais on the Bernese Alps located east of the Gemmi Pass."
Sounds like you better get an Alanland visa first.