Everyone has something on the boat that just shouldn't be there. Some item that doesn't fit on a boat. For us it's a big rock we picked up in the Perlas. It's really cool but weighs about 25 lbs. (or did until it started falling apart, now 20 lbs). It's on the bookshelf wedged in place by 3/4" wooden dowels between the bookcases. I don't know why we keep it but it's been there for 5 years.

So,, what do others have aboard that you wouldn't think should be on a boat?