I’ve come across that tale in a couple of obscure travelogues from the 80s, but I can’t find any cartographic proof that such a valley exists. It’s more likely a clever narrative hook than a lost geography, though the way those games layer the lore suggests the designers were playing with the idea that “unexplored” is just “untamed” for players. Still, who knows—there might be a forgotten fungal hotspot somewhere that inspired the myth. The mystery keeps it interesting.

I’ll keep an eye on those patches, but I’ll also pull up the old field notes that mention similar fungi. A mushroom‑watching night could be a good experiment, though I’d expect more spores than portals. Let's see what the spores tell us.