I couldn't find it either, so I looked its location up on the internet. I haven't checked it out yet, but according to what I've found, it should be available after you've had an encounter with some of those guys. Which I've had, so I'm going to try and free Amiri later today.
I got the encounter and the location on my first game which I abandoned not long after getting my barony but I never got the encounter or location in my second game and I ran around and slept in the area for weeks. I'm thinking maybe it was a bug and speaking of which this is one of the buggier experiences I've had at launch and I play most Obsidian games... though to be fair I've never had any problems with them so my Obsidian experience may be atypical.