[Hopefully worthwhile enough to bump the thread...]
Is that a building on top of the TRAP.MIM hill? (It's too small for me to be sure...) Fort Condor, maybe...? There is an unused CONVIL_3 (8KB BSX in original FF7j but no functional DAT or, I think, MIM).
I believe you, maybe I'm just not looking at it properly, but it looks to me like an aerial view of some cliffs, which throws me off.
That reminds me of FALLP: it has a MIM in all (PSX) versions and a functional DAT in the original FF7j, but I don't think it's used anywhere, although it seems to be a still from the parachute FMV. Enter the room in FF7j-original and you get this:
(You can just make out Cloud next to the yellow thing, for scale.) Maybe Square was once toying with extra overhead and zoomed-out views for some reason.
For some weeks, I dig Final Fantasy VII jp in search of novelty.
It might be worth looking at XMVTES; it has a working DAT in the original FF7j only, but if you enter it as a room you get what looks like a scene (vaguely Jenova-Synthesis-location-esque) with a messed-up palette:
I can't remember whether anything was ever found in DUMMY, either. (It looks as though it should load in FF7j... assuming it has
an ID.)