Huh.
Two OAR adventures (I recommend using
@Dyson Logos' Barrier Peaks maps instead of the way-too-large-by-today's-standards TSR maps), two UK modules, and two other solid 1E adventures. No obvious planar links. Both Crystal Cave and the Lost City are for the same level ranges, originally, which is probably something they'll change.
After Ghosts of Saltmarsh, I had expected Pharoah to be the anchor for a similar desert-set product. Interesting to see it pop up now.
All of these are generally well liked modules, but all of them dated by today's standards.