Hell, in Persian mythology is described as a deep well, terrifying because it is dark, stinking, and extremely narrow. The smallest of the xrafstars (harmful creatures) are as big as mountains, and all devour and destroy the soul of the damned.
There happens the most horrible punishments and tortures adapted to the sins committed by the damned. There is much emphasis on sexual crimes, but also on other actions disapproved of by Mazdean ethics.
Duzakh is firstly the residence of Ahriman, the demons, and the drujes. All atmospheric calamities are associated with it: snow, cold, hail, rain, burning heat, and so forth.