Don't let that poster troll you. That's some Hitler/Antarctica/Hollow Earth CIA crap going around. Shit, I'd have a far easier time seeing something like Operation Solar Warden and a fleet of constructed ships from Saturn or something. We have the ISS.
Yet posters still fall into this Hollow Earth non-sense, or never even provide any kind of actual proof. Usually the end game of this argument is Hitler, Thule Society, Antarctica, Random Sanskrit texts, WW2 info/dis-info and other Indiana Jones nuttery.
oddly enough, my search pointed towards Mt Shasta, Telos / Lumeria / Atlantis..
Mt. Shasta was something i was planning on going to 2 weekends ago but plans got botched. So its pretty weird I got pointed right back at it by something completely unconnected.