Cirith Ulunn (Sindarin for Monster Cleft) is a deep hollow with water ponds. It is located in a mountain pocket in the highlands, in the south-eastern corner of Tâl Bruinen, east of River Bruinen. The perfect nesting ground for rock-worms it is now the home of their patriarch Sarlug. And his off-spring have infested this otherwise quite secluded location.
-  Sarnemil's Flight
-  Worms On the Heights
These deeds can be advanced by exploring Cirith Ulunn:
These creatures are encountered within this location:
- Though worms can be found scattered in other areas of the Trollshaws, the breed here has grown particularly deadly and numerous. Indeed, the aggressive hunting instincts of these vicious beasts do a great deal to dissuade those few explorers and settlers who might otherwise take up their livelihoods in the Wilds of Tal Bruinen. — Deed
A cluster of the worm nests
A worm nest by the water in Cirith Ulunn