Reality's Rainbow

What are the higher planes of existence? I don't mean physically up in outer space. Granted, it's a big reality out there and there's probably lots to explore. I'm really talking about the ones that exist just next door that we walk clean through most of the time. Some call it heaven, paradise, elysian fields and many more. All I can say is...those things aren't really "up there". Sometimes, there are cracks in reality that are readily perceptible. A shimmer here, something that shouldn't be there but is, and all those random quirks of reality that most do not pay attention to. Perhaps there are cracks forming in the veil that hides the mysteries. I'm not entirely sure what it is, but when a wall seems to fade into nothingness for that split second, reality's rainbow shows itself.