Upon entering the 20th Aethyr, KHR, you will encounter some kind of object that looks like a spinning wheel. This wheel is apt to be large, so it will get your attention rather quickly. The word KHR itself means "wheel." The wheel is meant to covey to you the knowledge that life, existence, and the universe is circular in nature not linear. There is no beginning and no end, just an endless turning of perspective.
Everyone who enters KHR will probably see this wheel slightly differently. But, with practice you will be able to see the wheel's two major themes:
You may also in time see the physical universe here as a flat disc, with yourself separate from the disc. This too is another truth that you must learn: that you are independent of the very universe you are so intimately connected with. There are other lessons here to learn, so when you find yourself here, just gaze at the wheel and in a few moments the wheel will fall away and the lesson will begin. This Aethyr is a lot of fun once you let go of the fact that what you perceive is not always as it seems.
* additional source material: "Enochian Magick" by Gerald J. Schueler, "The Golden Dawn" by Israel Regardie