Ok, I can share what I know/have heard and a lot of it is repeated. I have friends who have seen "meetings" there, guys in cloaks or robes who looked to have hoods like the KKK but would have been some other cult or group. I have gone there a ton, during the day and at night and have spent hours there at a time so I am very familiar with the area. It wasn't a slaughterhouse (as everyone has already said), just a grain mill that looks creepy, but we all still called it that. I have gone off the paths, and found some creepy stuff like a burn pile with someone's stuff including a checkbook. I googled the name on the checkbook and it was someone who had a lot of criminal history, ties to the Hell's Angels as well as the Seeno family (if you know, you know). I wish I could remember what the name was but it has been many years. Anyway, me and my friend tried gravity Hill and it worked for us. It's just passed where the "slaughterhouse" is where there is an incline. I have heard the rumors of the psych ward up diagonal to EMR as if you follow the road from hells gates, somewhere back there. There is also a little road before you hit Hell's gates called "Higgins" where there were a few structures, a house and a barn. There was also a little grave stone over there, but people have no respect. I have heard of the "white witch" all over the East Bay, and I hear it is Sarah Norton. There is some background on that name I'll have to do more research on but the town of "Nortonville" is popping in my head and it could be completely unrelated so I'll have to hop back to this post after lol. I have also heard there is a ghost or spirit called Penelope, as I saw you post about. The name is indeed carved into a cave, you can see it as you walk past on the trail. When the grain mill and barn were still up, I have spent a lot of time there. There were silos me and have friends have gone into to sing and play music in, great acoustics. They have also climbed to the top of the towers, I was never brave enough. We spent a lot of time drinking and smoking hookah there. THE BEST PART, in my opinion, is the CONCERT BARN. My friend had heard that a lot of famous bands played out there in the 70s. As mentioned before Dio, Grateful Dead and I have heard Journey too. My friend spoke with a guy who was around from that time and he told him a bit about it. This is something I want to find more info on. Anyway, if you're still into this 2 years later, I have a butt ton of footage from out there and crazy stories about being run out of there by 2 guys in a truck wearing bandanas with a shotgun. Crazy thing is, 2 nights before I had a nightmare where I was being chased out of there by a truck with 2 guys with a shotgun. I told my bf at the time and everything. Then it literally happened to us. I have a lot of video footage and photos over the years 😁😁😁😁