This spire is down the hill from Fangorn Hills. The Orc cave is near the base of the spire.
Getting There
The best way to get to Torech Ungol is to walk down the gully southwest from Fangorn Hills. It is at the bottom of the hill in the small meadow type area. You should be able to see easily see the first two bolts of Shelob which starts on the Northeast corner.