(minor DM error, but its ok..)
The genasi, before passing through the SE door, does a double take and realizes the the westernmost south door may have been intended to be concealed, with some kind of stone looking covering that is now peeling off and no handle on this side.
...................
As opening these doors never triggered a trap, maybe they will step back, or maybe they wont. Actually did any of the doors here? And was it lightning? (And no one mentioned the gargoyle).
Opening the door reveals a 10 by 10 foot space just to the east. There is no other exit visible.