I went to the site of the Michigan Humongous Fungus today, on the eve of the little festival they have in honor of it.
https://www.smithsonianmag.com/smart-news/mushroom-massive-three-blue-whales-180970549As far as I could tell the area is public land, there were no "No Trespassing" signs anywhere - rural UPers are usually good about putting those up.
The government conducted ultra low frequency radio tests in the area, blasting the trees with radio waves and later harvesting the wood to see if there were any effects (there were no effects). When the trees were replanted, they all died after being attacked by the honey fungus in the area, leaving the clearing you can see part of in this picture. There are still logs, branches, and stumps all over the place here. Obviously it's not completely devoid of trees but these trees are noticeably thinner and younger than the surrounding forest.
