Their version of hell is called the Maw. There's no escape and you're just tortured for all eternity, but it's only for the truly irredeemable souls. Most evil people are sent to a place called Revendreth where they are also tortured for centuries and centuries, but the goal is to teach that person what they did wrong in their life. Eventually the process is complete and they're either transformed into the venthyr that work in Revendreth or they're sent back to the Arbiter, the being that decides where you deserve to go.
And you can't mount in the maw so it really is hell