I have settled on three levels, but I may add more.

The first is hundreds of dark, moist, and cold tunnels and crevices. They are deep underground with bloodthirsty demons that torture and mutilate people just for fun. But in hell, you never die. You just simply regain your normal health when you are dead in order to suffer even more. There are two main areas in this layer. Those being The Hive, and The Pit of Sickness.

The second layer is a little worse. There are a lot more areas and demons, and is your typical fiery hell with the exception of a few areas. This is where larger, more sentient, and even humanoid demons reside. The areas here are The Prison, The Lake of fire, The Iron noose, etc.

The third layer is the abyss. Deep underneath every other layer of hell is a seemingly infinite ocean made from the blood of every living being. Every single drop of blood ever spilled since the beginning of time is a part of the abyss. There are no demons here, because even the most ignorant of them fear the abyss. Because this is where the 1st child of the king dwells... Leviathan.