The first Thor movie gave us a dazzling view of Asgard as well as Jotunheim, home of the frost giants — but there was supposed to be a third realm in there: the home of the Rock Trolls. Check out some Rock Troll concept art by artist Wil Rees.

Update: Apparently this isn't a separate realm, after all, but is part of Asgard, where the Rock Trolls live until they're banished to Vanaheim.

These images of the Rock Trolls' home come via Film Sketchr. More at the link. [Wil Rees]

And here's some art showing Jotunheim: