The Wilds

I had three wild lands in my last game.  One was the Imperium Ruins, the other was the fire place (can't remember the name).  Both of these places I went in an killed everything single thing but i was never able to create outposts in either one.  Is this a bug or did I miss something.  I searched both places high and low for another critter and never found one.  I walked onto every spot and still nothing.

The other wild land I was not familiar with.  It was surrounded by mountains and on the north side there was a gate.  I never could find my way into the thing.  I am thinking this possibly a quest, and I never really pursued those very far.  Any one else seen this place and know how to get into it.