Seriously, is there every any explanation as to what the clearly-Slender-Man figures all over the walls are? I couldn't find anything in the wiki. That made me a very unhappy courier.
Nope, no info on the slenderman.
I will say that I was
really unnerved to be walking around Zion after dark though, because I was sure the slenderman or skinwalker or whatever creature those hideous tentacle paintings were meant to represent would come and get me. Kind of disappointing that the threat never materialized.