The true story is, back in the 1980's there was a teenage hangout called "The Party tree". Ask Antioch, Oakley and Brentwood OG's about the spot. It was located down the road from Gravity Hill, The Slaugtherhouse, and Hells Gates toward Antioch. Also, on this same road there is a small cave in the hills you can see from the road. Between the cave, and the Slaugtherhouse going towards Antioch there a cliffs and rock formations on the right hand side.
Well anyways, the Slaugtherhouse property was owned by a man who owed a group of drug dealers a lot of scratch back in the day and they eventually cut the dudes head off. Before that, he would throw parties with Rock N Roll / metal performers like Y&T and shit like that. So it would be a huge party spot.
Here are some photos I've taken in and around the Slaughterhouse property.