Up river (South East) from Val Kydnt, in the Intervale between the two rivers from Mount Durn, there is a cave network known from time to time to issue fire demons (marked “F” on the map of the North Western slope. This cave is a source of great fear and for as long as anyone can remember has discouraged civilization from taking root in the elevated, fertile vale.
The main entrance of the cave is marked with a sign warning travelers not to stay there or in the area. A different, sink-hole entrance is much less well known and less used by demons. A third, cliff entrance is hard to access from the outside.
Inside the cave, a group of geysers feed a small pool and stream that pours out into the river.
A portal at the back of the cave opens to allow a fire demon to pass periodically.