Despite the imaginative and humorous content of this podcast, this could be a good starting point to describe the Spirit World based on reports by psychic people, near-death experiencers, astral travellers and discarnate spirits communicating through mediums.
Here is how Betty Eadie describes a Garden she visited as part of her NDE, in her book Embraced by the Light:
Here are some quotations from Life in the World Unseen, a mediumistic account of the Afterlife by Anthony Borgia:As we went outdoors into the garden I saw mountains, spectacular valleys, and rivers in the distance. My escorts left me, and I was allowed to proceed alone, perhaps to experience the full beauty of the garden unencumbered by the presence of others. The garden was filled with trees and flowers and plants that somehow made their setting seem inevitable, as if they were meant to be exactly how and where they were. I walked on the grass for a time. It was crisp, cool, and brilliant green, and it felt alive under my feet.
But what filled me with awe in the garden more than anything were the intense colors. We have nothing like them. When light strikes an object here, the light reflects off that object in a certain color. Thousands of shades are possible. Light in the spirit world doesn't necessarily reflect off anything. It comes from within and appears to be a living essence. A million, a billion colors are possible.
The flowers, for example, are so vivid and luminescent with color that they don't seem to be solid. Because of each plant's intense aura of light, it is difficult to define where the plant's surface starts and stops. It is obvious that each part of the plant, each microscopic part, is made up of its own intelligence. This is the best word I can use to define it. Every minute part is filled with its own life and can be reorganized with other elements to create anything in existence. The same element that now resides in a flower may later be part of something else—and just as alive. It doesn't have a spirit as we do, but it has intelligence and organization and can react to the will of God and other universal laws. All of this is evident as you see creation there, and particularly evident in the flowers.
A beautiful river ran through the garden not far from me, and I was immediately drawn to it. I saw that the river was fed by a large cascading waterfall of the purest water, and from there the river fed into a pond. The water dazzled with its clarity and life. Life, it was in the water too. Each drop from the waterfall had its own intelligence and purpose. A melody of majestic beauty carried from the waterfall and filled the garden, eventually merging with other melodies that I was now only faintly aware of. The music came from the water itself, from its intelligence. And each drop produced its own tone and melody which mingled and interacted with every other sound and strain around it. The water was praising God for its life and joy.
The overall effect seemed beyond the ability of any symphony or composer here. In comparison, our best music here would sound like a child playing a tin drum. We simply don't have the capacity to comprehend the vastness and strength of the music there, let alone begin to create it.
As I got closer to the water the thought came to me that these could possibly be the "living waters" mentioned in the scriptures, and I wanted to bathe in them. As I approached the water, I noticed a rose near me that seemed to stand out from the other flowers, and I stopped to examine it. Its beauty was breathtaking. Among all the flowers there, none captured me like this one. It was gently swaying to faint music, and singing praises to the Lord with sweet tones of its own. I realized that I could actually see it growing. As it developed before my eyes, my spirit was moved, and I wanted to experience its life, to step into it and feel its spirit. As this thought came to me, I seemed to be able to see down into it. It was as though my vision had become microscopic and allowed me to penetrate the rose's deepest parts.
But it was much more than a visual experience. I felt the rose's presence around me, as if I were actually inside and part of the flower. I experienced it as if I were the flower. I felt the rose swaying to the music of all the other flowers, and I felt it creating its own music, a melody that perfectly harmonized with the thousands of other roses joining it. I understood that the music in my flower came from its individual parts, that its petals produced their own tones, and that each intelligence within that petal was adding to its perfect notes, each working harmoniously for the overall effect—which was joy.
My joy was absolutely full again! I felt God in the plant, in me, his love pouring into us. We were all one! I will never forget the rose that I was. That one experience, just a glimmer of the grander joy that is available in the spirit world, in being one with everything else, was so great that I will cherish it forever.
After a short while our progress seemed to slacken somewhat, and I could feel that there was something very solid under my feet. I was told to open my eyes. I did so. What I saw was my old home that I had lived in on the earth-plane; my old home—but with a difference. It was improved in a way that I had not been able to do to its earthly counterpart. The house itself was rejuvenated, as it seemed to me from a first glance, rather than restored, but it was the gardens round it that attracted my attention more fully. (…) It was not merely the flowers themselves and their unbelievable range of superb colourings that caught my attention, but the vital atmosphere of eternal life that they threw out, as it were, in every direction. And as one approached any particular group of flowers, or even a single bloom, there seemed to pour out great streams of energizing power which uplifted the soul spiritually and gave it strength, while the heavenly perfumes they exhaled were such as no soul clothed in its mantle of flesh has ever experienced. All these flowers were living and breathing, and they were, so my friend informed me, incorruptible.
(…)
[The protagonist is describing an art gallery in the sprit world and comparing the pictures with those seen on the earth plane] Another great point of dissimilarity—and the most important—was the fact that here all these pictures were alive. It is impossible to convey any idea of this paramount difference. These spirit pictures must be seen here to understand it. I can only just suggest an idea. These pictures, then, whether landscape or portrait, were never flat; that is, they did not seem to have been painted upon a flat canvas. They possessed, on the other hand, all the completeness of relief. The subject stood forth almost as though it were a model— a model whereof one could take hold of all the elements that went to the making up of the subject of the picture. One felt that the shadows were real shadows cast by real objects. The colors glowed with life, even among the very early works before much progress had been made.
(…)
The united thoughts of the inhabitants of the whole realm will sustain all that grows within it, the flowers, and the trees and the grass and the water, too, whether of lake, river, or sea—for water is fully alive in the spirit world. It is when we come into the city and travel through the halls of learning that the organization becomes outwardly mare observable.