Hell's Blacksmith, how do I get there?

[faradin]

I've just completed the "Large Gate" main quest, and I'm standing out in front of the cave, but I don't see how I'm supposed to get from here to there. I thought I had explored every knook and cranny, but I've obviously missed something somewhere. Probably something big and obvious...

Any and all assistance is appreciated.

*Edit*
Yep, it was obvious. Never mind .