I've been there, seen this, taken the picture, and walked all around the base. An amazing site and sight. Did you ever climb this thing? I remember seeing climbers working their way up, to the dismay of nesting raptors who circled their heads, throwing shrill, birdish epithets at the space invaders of their realm.
Looks like the mountain from the movie, "Close Encounters of the third kind" where they feature a mountain almost exactly this shape. Strange. I suppose this is quite big compare to the trees below.