Actually a lichen, not a moss, Icelandic moss has a vast array of medicinal and nutritional uses. Though I'm told that -- as with many of Iceland's delicate natural wonders -- you shouldn't tromp around on it or remove it from the ground.
We found this vast field of moss near a turnoff from the Ring Road. Sadly, people had tromped on some of it, and we found piles of human feces and wads of toilet paper near the road.
Humans are the worst.