So people ...
I'm juggling around 3 ideas for Starting location A right now and can't really decide.
So let me give a quick pitch for every idea and we'll se what gets the best reaction.
Some of it might be too gonzo or weird for starters but bear with me.
1. Arnlaugs Carcass
34 years ago famous bandit lord Arnlaug the Joyous, finally tired of robbing and blackmailing the nobles, set out to find something new.
At the fringes of the mountain (the zone? the plateau?), hidden in a small valley he found the fossilized carcass of a giant, vaguely insectoid creature.
In the cavities inside the long dead creature he build his stronghold, attracting all kinds of dishonorable folk over the years.
A safe haven for all kind of thieving folks and down on their luck nobodys, Arnlaugs Carcass is a rather chaotic place.
Rumor has it that deep inside the Carcass Arnlaugs workers mine for gold, silver, gems and even stranger materials ... found nowhere else.
2. The Cracks
Somewhere in our zone there once was a grand plateau that got splintered, as by a gods fist, an age ago.
Now there are thousands of small canyons, caves and subterranean rooms that are all interconnected. A maze of epic proportions, keeping those that live there safe from all harm.
Periodically though some caves and canyons get flooded, forcing the inhabitants to keep moving in patterns only their elders understand to prevent them all from dying in the flood.
The greatest settlement in the cracks is a chaotic mixture of wagons, tents, rafts and other mobile apparatures. Capable of moving the whole settlement in half a day, only it's dedicated protectors (rangers) ever know where it is exactly.
Rumors say that a tribe of Frog men living underground are allied with the Cracksmen, helping them navigating the maze and sharing their strange magic with them.
3. The Monastery
At the side of one of the greatest peaks, build neatly into the steep wall lies the Monastery.
Founded hundreds of years ago by human monks seeking enlightement and isolation from the world, it has now become a kind of neutral meeting place for the warring factions of the zone.
As long as you keep the peace and respect their rules, the monks turn away nobody. As the Monastery can only be reached trough a handful of hidden and well guarded paths, no one has ever taken it by force (even though some factions surely would've liked that).
Rumors say that the monks are privy to hidden knowledge gleamed from the stones and the earth itself. The eldest monks, it is said, are hundreds of years old and utterly inhuman in their minds and abilties.
Everything is a rough pitch right now and open to change as necessary.
Edit:
A few more words on this.
Carcass - chaotic
Cracks - neutral
Monastery - lawful
The Carcass could serve as foreshadowing of latter developments. Maybe more of this creatures species will appear?
The Cracks are inspired by the shattered plains from Brandon Sandersons Stormlight Archive series.
For the Monastery and the monks I'm thinking tibetian monks .. not shaolin please
Maybe they are "ruled" by a triad of monks that were enlightened trought their practices. Think about the Tribunal from Morrowind (Elder Scrolls).
the basic pitch here would be a neutral place that no one darres to attack directly and everyone there grudgingly has to accept their rules.