Terrorweb Tunnel[4, 35]
is a long and winding tunnel into the mountain northwest of Terrordale. It is full of Crypt Fiends (Nerubians), and stretches through the mountain from Terrordale in the north and extends south to the Thondroril River. At the entrance from the river, you can find a level 61 (elite) quest giver, Tirion Fordring.
One must be very careful when travelling this path, as not only is this path crowded with many Crypt Fiends, but occasionally a very powerful and elite member of its kind, the Nerubian Overseer, stalks the tunnel.