The Dawlan Mountains was a short adventure in the nondescript North of whatever you are.
It has a spot on the Regular Quest world map.

The short story is that the Dawlan Mountains were home to a civilisation who build a large castle town on top of their mines. But stories say that next to the rich ore, more sinister things hide in it's lower reaches.
The party arrives at a camp infront of an opening to the Dawlan Mountains. Many adventurers and would-be treasure hunters gather here. The air is chilly but snowfall is minor.
The opening to the Dawnlan Mountains here was an opening to the mine. Past the gate you are greeted by large wooden doors leading into what was a servants quarter. By the walls itself, 2 statues look out over the camp.
The entry way quickly splits into small hallways. Some small rooms to dine or drink, seperate rooms and a staircase downward.

Some people have chosen to stay inside, away from the weather. Small groups huddle around makeshift campfires and they ponder about going deeper.
The stairs down lead to a hallway of personal rooms. Rumble lines the floor as you hallway turns to an in-house smithery. Every piece of coal has been picked clean and not a single weapon or even belt remains. A track leads into a rough, rocky cave.
A storage and some tables for sitting rest in this dimly lit level of the mine.
In the far back a large, jagged worm and it's young bar the way. The creature emerges from a pre-made hole in the mines floor.

Faint light can be seen looking down. Dark tiled square platforms are vaguely visible from this high up.

Something awaits down there.