Last Updated: 9/18/2017
There are no special requirements needed to view this easter egg.
Located in the Grande Pastura area, just North of the Alte Potentia military plant is a crater surrounded by burnt forest with a large, blue Norse hammer in the center of it.
This hammer and crater are both references to the “Thor” movie scene where Thor’s Hammer falls to Earth and makes a crater which is eventually discovered by the people of a nearby town (including Stan Lee). And just as in the movie, the hammer in game is completely unmovable / invincible.