I worked at the haunted house and got to explore the place from top to bottom. It's beautiful still (in some places) and I think it's best left unexplored to an extent because it's not all fucked up with graffiti and trashed.
Got around to throwing a few pics on an accessible site:
And while I know that not stealing things from buildings is the respectable UE code.... if you see Halloweeny stuff in that building... don't steal it. Most of it is mine.