This dungeon houses the Dragon which guards the Talisman. It's almost smack-dab in the middle of the northern mountain range on Quilinor.
Ground Floor[]

Ground floor
There's nothing of importance on this floor. Consider bee lining for stairs down.
Basement 1[]

Basement 1
The Dragon is on this floor in the middle, hidden behind several secret doors. The rest of it doesn't matter.
Basement 2[]

Basement 2
This floor is a deliberate waste of time.