Questions:
Truth of aliens
Location of ruins/artifacts/secrets of Atlantis, Mu, and Lemuria
True nature/purpose of the Egyptian pyramids
Location of anything written in Old Realm
Some ideas for foci:
Aliens:
Use Roswell Grey dissection photos for "identities of actual aliens who have visited Earth"
Use the night sky or the chart of our galaxy for "locations of actual alien civilizations"
Use SETI (either go visit, or use the photos from their websites) for "contents of the longest alien message to ever reach Earth"
Locations and lore:
Use the text of Plato's Atlantis for the location of actual Atlantis
Use the bible for the location of Tower of Babel maybe?
Use various types of buildings (such as libraries, vaults, prisons, temples) to find "the location of oldest existing *insert type of building here*". Possibly do the same with various types of objects (swords, books, and, for fun, a shuttle for "spacecraft").
And yes, of course use our examples of Old Realm to look for locations of anything written in this language. If we had more than one focus, I would gamble and ask for "locations of native speakers of this language", but with only one focus available, that's too big of a leap.
When we visit the NeverNever "Scar" location from which our exaltation shard was taken (because we really should) we could probably ask for the origin of said location. Or the locations of other stuff originating from the era in which the scar was created. Or something like that. We'll need to figure out the correct question.
The glow of Lydia's anima could probably be used to find the other exalted, or people capable of exalting (maybe there are dragonblooded still existing), or the mechanisms / proper names for what we are. Our exaltation can't see itself, but it can see Lydia.
It's a bit metagamey, but I want to go to a desert and ask for the location (or identity) of the oldest desert. To find Cecelyne.
We have reason to investigate Kukulkan. We know that Red King isn't actually Kukulkan, but we might locate something of the original. Who might or might not be related to dragon kings. And even if he isn't, having a godly ally is useful.