A camper I disassembled awhile back. Had to wear a mask to avoid black mold poisoning.
I'm thinking something along those lines with a boat in my pasture.
I also have a boat, but instead of a pasture, it's in the forest. I sold it eight years ago and the new owners drilled a hole in it to drain the water out of it and then left it there. They payed for it and everything, but just left it there.
Speaking of black mold, ever notice that you take on some of the fears of your parents? For some people it's the common cold and for others it's lock jaw (tetanus). For my parents, it was black mold.