Dreams in a Parallel Universe?

There may be different things happening while we sleep. Some dreams may be visitations or forays on the astral plane others may be just our mind working out emotions. Perhaps we even have more than one reality. All may be possible at different times. I’m open minded to the possibilities.
 
I tend to believe that dreams are at times one thing, then at others, another. What Ultima says rings true for me, in that often our dreams are merely our subconscious giving us important messages without the interference of ego. But at other times I feel that I am visiting alternate realities, or even astral traveling. And, like Tex said, I have felt wonderfully free and amazing in dreams, only to come back to the sobering reality of my earthbound limitations.