I remember from my studies of the Vedas that it describes the underworld regions or “hells” as they would call it in Christianity. I remember reading that the underworld below our earth plane is described as more materially wealthy than even the heavens where the gods exist (above). I also remember reading that this wealthy underworld has no sun, so maybe it is a black sun although I don’t remember the sanskrit term for “black sun” being mentioned so I don’t know about that point for sure.
Either way I am able to visualize this nether region and really see it in my mind’s eye.
Before shitty western religion like Islam and Christianity took over the world, there was so many traditions in so many parts of the world and they all are very similar and pretty much have the exact same ideas.