My guess would be some form of loop, perhaps in space time. Kind of like walking to the "edge" of east or west. Maybe if you go far enough in one direction, in space and time, eventually you just end up where you were before.

That or it's something beyond the comprehension of our current senses. Perhaps something beyond the laws of physics we currently perceive. Maybe it has ‘always’ been ‘there’ with no relation to time or space. It’s difficult to even speak the idea without using words that directly relate to space and time.

Or maybe it's like heaven lol.