I'm bored here at work and they taught me that this is supposedly art
First underground level of something that will never exist, nor was it intended to exist. Guessing game, anyone?
This very nearly cost me my degree back in the day, coz "...no way in hell a student could organize a facility this complex to meet all the regulations, norms and requirements unless he flat-out copied it from somewhere, because even esteemed professors consult experts when dealing with these things"
Ever heard of something called research
Sigh...very bad memories. A truckload of nerves I'll never get back...