You can have any one thing, what will it be?

So the rules are you can have one thing. It can’t be sold. It has to be an object. Hopefully it has some inherent oneness that makes it not many things. It has to be smaller than a continent, and you have to be able to afford to maintain it without needing to sell it.

You can have other stuff in life, but for the sake of this question you can pick one thing in the whole world. It can be something that is depletable. But not a gift card or some monetary instrument. More like bread, or cheese. I don’t know. Just avoid coming up with an answer that means you can just get a whole bunch of other stuff.

It has to be something that has a known whereabouts. It should not be fictitious.