- The first time he sees the key, it is found in the bottom of a tub in the female hydrotherapy room (2nd Floor, foggy version). Travis needs to empty the tub since the hot water would scald him otherwise, so he drains it out, along with the key.
- The next time, he finds it (though he can't see the key) stuck inside a toilet in the last stall of the women's restroom (1st Floor, still "normal" version). He flushes it, sending the key to the basement.
- At last, after changing to the Otherworld version of the building, Travis makes it to the east pipe room in the basement, where the key is lying in a drain and can be picked up.
The archives key unlocks the archive in the 2nd Floor, where Travis can find items, a mirror, and more clues about his past.