But then it would result in a very large cluster of castles if the zones where they are located only serve as a way to implement the idea of random generation...
I'm understanding the essence of the method less and less...
But from what I understand (maybe I'm wrong), it doesn't seem to be very suitable because the point is to start in a random zone (in a random location) with a castle of the chosen race.
There can be many such zones, and not all of them have castles.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!