There are different structures of the spirit world.Imagine a dartboard with 5 rings.The centre is earth,then etheric plane,astral plane,mental plane and celestial plane.Each one from earth outwards vibrates at a higher frequency than the one before.
Earth is the darkest most dense of the worlds.
Theres the summerland too its the barrier between one dimension to the next.This is the plain described the most with near death experiences.Its a place of thought,created by beings on a higher dimension.Then theres even higher dimensions that lie beyond the astral plane that us as humans could not even comprehend.Theres alsoa dimension like hell.People have seen this side with near death exps too but is more likeley to be cold and bleak tahn hot and smoky
HOPE I DIDNT TALK TOO MUCH CRAP i believe in these different planes.