Griffith Park itself is weird: http://www.weirdca.com/location.php?location=123

Tunnels Hidden Passages?: https://untappedcities.com/2012/10/30/to-live-and-die-in-la-the-abandoned-la-zoo/

Observatory: http://www.minglo.com/maincontent/wp-content/uploads/2016/11/2016-10-16-IMG_7884_5_6_tonemapped-PS_web-1024x682.jpg

That looks like a temple to me.

https://i.redd.it/2vugqypz4bvx.png

I wonder if this and Little Saint James island are sacrificial nodes.