Lost in time: The strange and grim stories behind abandoned buildings that would make perfect rave venues
These relics of the past have long been forgotten and reclaimed by nature.
Read the feature: https://www.orbmag.com/features/lost-in-time-the-strange-and-grim-stories-behind-abandoned-buildings-that-would-make-perfect-rave-venues/
what about something like that:
http://www.ghostsofnorthdakota.com/2011/08/14/nekoma-safeguard-complex/