It's indeed a super fun game! I played it a bunch in high school but hadn't thought about it as a test of rationality :)

I usually use the languages on signs as a starting point and am not as good with other cues, but when I was in high school I played at my friend's house and her dad was a geologist, and that was an interesting new angle. Also one time it dropped me in my (quite small) hometown, which was wild. 

New Yorker profile of GeoWizard.

Thanks for sharing, just played my first round and it was a lot of fun!