To avoid confusion, I think the boulder on the wall of the Goblin Fort should be removed and just have a blue transition box put in place. I guess there's rope on the wall there, but if you climb up to the top and just walk forward to the boulder, you won't see it. It looks just like the boulder in the Basement Elemental quest. A rope that's a transition is a little more obvious than a boulder.
I was not expecting that boulder to actually be a transition once we were out after finishing the quest...and yeah, I clicked on it expecting the 'Examine the boulder more closely' dialog, but instead got teleported down where there were two goblin assassins that paralized me instantly and sent me packin' :(