Pfunky Pfungal Pforest

"For generations, the Pfungal Pforest has slowly expanded across the borderlands between what humans call civilization, and the wild places beyond. Several hundred hectares of tree-sized mushrooms and toadstools, dense enough to obstruct vision and too thick to traverse by vehicle, gradually spread out and consume the small outposts and border towns which represent the furthest reaches of the kingdoms and empires of man. Pockets of noxious spore-choked vapors drift randomly between the stalks and growths, creating an ever-shifting miasma of hallucinatory, mutagenic gas."

Another pamphlet-sized location to slap into your OSR-lite games. Gross plant life, killer snails, and mysterious inhabitants to help inspire brave dungeoneers.