Its a 1:1 world just like earth. A different dimension, the afterlife or how you want to call it. The place is a energetic area where you move with your astral body and the things you can do there are similiar with lucid dreams but with the difference that its very real in that dimension. The astral world itself is a rather ’shadowed‘ place or lets say it has a blue touch.
If you want to know more about astral travel and the astral worlds, just check here:
A story of a body piling beaver
Time traps inside Dreams!
Are otherworldly contacts dangerous ? heres the answer