Dimension planes are other worlds beyond the physical that can be reached through and only with astral projection. Their are many worlds where a user can explore. These worlds are abound with energy, different sources are unknown, but still can be access with or without no harm. The Dimension plane that we travel to for now is the Valley of Light, Which is a peaceful dimension with Happy people, and place of positive energy flowing outwards to the whole world, making it pure good. That is not the only dimension that can be accessed, others too can explore different places, but they are right now not discovered yet.