The Void

The Void is a place beyond the boundary of creation, where nothing exists, not even a vacuum. There is no matter, no energy, no activity on the subatomic scale; there is a true nothingness reaching forever in all directions.

It's worth to note, however, that despite being infinite in size and lacking anything you can find within creation, a few creatures do exist there, though the possibility of running into one of these is impossibly slim.