The tunnels!
This was originally a Cohost post. I think it's fucking incredible so I'm putting it here too. Every moment of this video feels completely fake but I guess it's real? The user has not posted a single thing since they posted this video 16 years ago!!!
After my most recent bike trip into the flood control tunnels, we were looking for more videos of urban tunnel systems... and while looking for footage of the UCSD steam tunnels, we found something that looks more like the beginning to a real life found-footage horror situation than anything I've ever seen before in my life.
This video blocks plays on sites other than Youtube, so check it out here.