Just because land is unregistered, doesn't mean that it's not owned and adverse possession is not as straightforward as people tend to think that it is.
It's also good to bear in mind that the land may have problems or liabilities that, even if the land was given or sold to you, you wouldn't want to take on.
Whether there could be problems is not an easy question as there is a lot we don't know. Is there any access to this parcel of land at all, not necessarily just to it, but can it be accessed generally or is it "locked" in by other properties?