So lemme ask you something as an aise: step back for a minute and ask yourself where else you have heard that there are realms outside of time and space, where else you have heard that are non-physical (from a layman's understanding) realms?
The seven heavens of Islam? Fantasy books like the Lord of the Rings? Greek Mythology? The list is endless. I wonder what you had in mind.;)
(I realise that made up ideas of what might be outside the fabric of spacetime also might be outside the topic, so my apologies if they are).