You both are already on the first floor, and you don't see any sort of basement access. Since the facility's layout has been straightforward so far, it's a safe bet there aren't any below-ground levels.
You're able to exit the facility via any number of blown-apart sections of wall...or the old-fashioned way, by using a damaged door in the admin room. However, the door has "EMERGENCY EXIT - DO NOT LEAVE UNLESS SITUATION IS CRITICAL" on it, along with several other similarly-worded warnings.
Outside, you see the same thing you saw earlier, when you were peering out from the third floor: rocky terrain, an ominous sky, far-off mountains.
Although Rocketeer's tech allows her to "zoom in" on the noise, the language being spoken is unknown...if it's even a language at all. It sounds like gibberish, punctuated with squeals, cackles, and snarls. Despite all this, you can detect that there are three different entities "conversing." You can also detect a sort of passive-aggressiveness to the exchange, like the three are perpetually aggrevied whiners who nevertheless believe themselves to be big shots.
