I didn't even think of a secret room but based on Ferociter's reply, I'm guessing its in the outdoor section.
I tried the outdoor section and couldn't find anything
Yeah, same. Guess I was wrong.
Must be some sort fake wall somewhere, or maybe jumping off the side or continuing up somehow will do it
I don't know, I do remember seeing some fancy symbols on the wall on my playthroughs that might have something to do with it.
