In practice, is there any land in the US whose ownership status is "no one knows, so no one gets to use it"? Because that is the case for a lot of copyrighted

In practice, is there any land in the US whose ownership status is "no one knows, so no one gets to use it"? Because that is the case for a lot of copyrighted works. So there's at least one difference between the two that's not related to ease of creation/copying, and an argument for limited terms.