The abode of fornicators

And do not approach unlawful sexual intercourse. Indeed, it is ever an immorality and is evil as a way.

[Qur'aan 17:32]

Those who commit unlawful sexual intercourse will in something like a baking oven. It will have a narrow top and a wide bottom. There will be a fire kindling under the hole. When the fire-flame will go up it will lift these immoral and disgusting individuals all the way up to the opening of the hole.

And then when the fire-flame goes down they will go back down to the bottom of the hole. They will be naked just like they got naked shamelessly in this world. But this time it won't be for pleasure. Rather, they will cry out as they burn. 

"...They told me to proceed on; so we proceeded on and passed by a hole like an oven; with a narrow top and wide bottom, and the fire was kindling underneath that hole. Whenever the fire-flame went up, the people were lifted up to such an extent that they about to get out of it, and whenever the fire got quieter, the people went down into it, and there were naked men and women in it. I said, 'Who is this?' They told me to proceed on...."

"...And those you saw in the hole (like oven) were those men and women who commit illegal sexual intercourse..."

[Portion taken from a longer hadith in Sahih al-Bukhaari Hadith No. 1386]