Another "pop up" inner gatefold, The Bee Gees To Whom it May Concern: Among the orchestra you may find a few notable people, such as Lulu and Ahmet Ertegun.
Here's a few of my favorite gatefolds (including a couple of tri-folds) The Mars Volta: Francis The Mute Queens Of The Stoneage: Rated R (rated X) porno gatefold jacket. Tool: Ænima Pearl Jam: Greatest Hits Tri-Fold sleeve Soundgarden: Superunknown
I won't post it because of (female) nudity, but the gatefold to Eric Burdon & War's Black Man's Burdon is let's say, very interesting.