Black Mesa from Half-Life inspired papes. Let's get that "United States Department of Energy National Laboratories" feel. You know what I'm talking about, the feel you get the first time you explore Black Mesa in HL1 or Black Mesa East in HL2. It would be specially nice if they have a desert theme but it is not required. Also would be nice if the papes are from real life but it is not necessary.
Think about massive nuclear underground facility/bunker, shit like that.