I know of some land personally that the Government of Canada has held for no apparent reason. I've done some digging, and my understanding is that the government has no long-term objective to ever develop or to use that land again. I was curious, because it is located in a place where development could take place if it were handed over to the private sector. Maybe we'll have a conversation at some point about that.
I know there are farmers whose farms get so big that they forget where all their land is, and maybe this is a case in which some department has forgotten that they own it.