Vault Maker
Vault-Tec Cartographer
This guy's blog has a bit on a Titan 1 silo complex in eastern Washington, near Moses Lake. You've seen silo shots before, but unlike most, this one has almost entirely exterior shots, and the terrain is pretty consistent with the look of the Fallout wasteland.
http://jaylake.livejournal.com/1277082.html
Titan 1 was disbanded in the mid-60s, and the sites were sold to private owners (a few were purchased by government agencies). Since they didn't have to be demolished like a lot of later systems (due to arms-control treaties with Russia), they are still semi-intact on the surface. Good source material for modders, perhaps. Inside they tend to fill with groundwater. When they were in use, they must have required sump pumps to remove the water that seeped in.
The comments at the bottom of the page include a link to a site with lots of missile silo goodness, including pictures, maps, and history:
http://www.techbastard.com/
This brings back warm, yet at the same time slightly chilling, memories of sneaking into Titan 1 complex 4C of the 851st Strategic Missile Squadron outside Chico, CA back in '93. I should scan and post those pics someday. That one had water filling it up to just below the level of the main connector tunnels, so the only part of the silos we saw were the upper chamber just below the doors...though that was about 15 meters high.
The strongest feeling I recall was that you were just a part of a huge machine, which I have only felt since in the Holocaust Museum in Washington, DC. Where the building no longer served us, but was in almost complete control.
A really odd moment came while looking through the Titan 1's old control room. Banks of large cabinets for old computers or other electronic gear lined the room, mostly empty of their parts, so they were just the sheet metal shells. Each was about a meter wide, maybe half a meter deep, and 2 meters high, and had stenciled labels for it's function. Reading along you saw "Exterior Lights", "Interior Lights", "Primary Ventilation", "Security Perimter", and all kinds of mundane things, until you got to "Target Grid Orange", "Target Grid Green"... I haven't a chill like that since (on the same trip to DC as the Holocaust Mus.) I saw the Enola Gay in the workshops of the Smithsonian, and actually got to lean inside the fuselage about 2-3 meters from the cradle for The Bomb.
Ok, "sharing" is over now.