There were a couple screenshots of it in the other Garr Solo thread. It's basically right at the corner just north of the red dot. You start near the hallway that leads toward Geddon/Shazzrah and slowly walk along the wall until that corner. It's tricky to find the exact spot but as long as there's no core hounds there at that exact moment, you can afford to fall off of the wall a few times while you're finding it.
_________________
I can keep rhythm with no metronome.


