Template:C/10
From the One Wiki to Rule Them All, the Lord of the Rings Encyclopedia.
Helm's Deep was a large valley in the north-western Ered Nimrais (White Mountains).
The valley was blocked over its entire width by the natural series of hills called Helm's Dike and behind that lay the fortress of Aglarond or the Hornburg, at the entrance to the Glittering Caves.