Big Reishi

[Ice Hole]

 

Maybe some of those filthy hippies who took over Pleasant Valley Rural Corner learned to grow big reishi mushrooms.  

[UpUpAway95]

I like the idea.  Perhaps it could even be the mystery in Mystery Lake... perhaps tucked away in Dave's Quiet Clearing (and growing there because of some underground hot spring)... turning it into a warm place... but one that is unsuitable for staying in because of the toxic gases that accumulate in the cave from the sulfur in the spring.

[Lankyone]

It may seem a bit too fantasy-like for TLD, but I could see this as a reason to go into the aurora elevator mine in CH. These big mushrooms on a tree trunks in a caved in cave after the surface collapsed. Along with some of that blue moss, some miner corpses, and maybe a ravenous wolf guard? Or a train car with loot or something also.