Humanity used to boast three large cities. The cities acted independently but were banded together for their mutual economic and defensive benefit. This is called The Confederation. Now most off the military is dead: killed trying to stop the horrors that appeared.
The northernmost city is Ashwood. It sits near the start of The Vast Tundra. Much of the construction is wood with animal skins to keep warmth in.
Redstone is in the west in the badlands. It sits perched above a vast canyon. A large lift rises up from the dock on the river to the adobe structures above.
In the south is Darkfen. It is about one mile from the river that runs passed Redstone. It is a city of stone and wood.