This is a short experience, but often these are intended to learn from and gain insight.
One night my spirit went to one of the higher astral worlds. I went up a hill and entered a small temple. Once inside the temple I did not see it as a stone structure, but I saw its energetic matrix that exists at the basis of all substance and matter of the lower worlds. I saw the temple as a complex of brightly colored energy lines. I also heard divine music that corresponded with energy at this level. The music is of a kind that does not exist in the physical world.
We really have to expand our consciousness outside this material world. Each lower world/dimension is based on and formed according to the energy template of the world/dimension above it. On a high spiritual level, everything exists as abstract looking lines of color, light and sound. On this vibrational matrix the lower worlds arrange themselves and create the form we can experience. Al the way to the physical world.