Large single kayak that has been lurking at the top of my garden waiting for me to repair it - I think it's time to admit that isn't going to happen...
It seems reasonably solid but it has been outside for years and (long story) it has been hit in several places by a shotgun so has multiple small holes at one end - picture added of one area to give you an idea.
Perhaps someone has the time to repair it, or has a cunning plan for a use where it doesn't need to be watertight...