From the info I can gather online, the Murphy Ranch was a former Nazi compound located deep in the Los Angeles mountains (now part of Will Rogers State Historic Park). In the 30s, the place was occupied by Nazis living in America who thought the US would fall to Nazi regime. When the US government raided the place, it was left abandoned in the hills until it was later taken over by artists and turned into some sort of art commune in the 60s and 70s (again, this is all 2nd-hand-info and I haven’t been able to confirm any of this from my searches online). After a fire in 1978 in the area, the place was left abandoned, partially destroyed, and open to vandalism and mountain explorers.
Getting to the site involved a bit of hiking and going down lots of concrete steps! It was fun though and eventually me and some friends found ourselves at the site which is completely covered by graffiti and gutted almost entirely both inside and out.
If you’d like to do the hike yourself, grab some water and follow these directions. Otherwise, check out some more photos after the jump!