CERN, in 2004 I think. Everything was beige in that world. Walls, ceilings, tables, chairs. Computers. Inoffensive. Immaculate. Like some kind of Scandinavian correctional / mental facility.
At night though, you might walk down a flight of stairs and find yourself in poorly lit tunnels, lined with sagging cables and steaming pipes, stepping over black pools of standing water and past broken metal walkways, as if you'd somehow crossed a threshold between Geneva and Doom or Half-Life.
At least that’s how I remember it.