Black Pit

According to the Book:

A terrible crack in the earth, Black Pit seems to lead to the darkest depths of Khyber itself. The great chasm can be found in a secluded valley in the Blackcap Mountains, where toxic vapors rise from deep within the gaping hole. Fearful sounds accompany the foul vapors, as though the depths themselves were writhing in pain and torment. Some have tried to descend into Khyber using Black Pit, but the sheer walls of the chasm are treacherous and deadly creatures are said to inhabit the caves that honeycomb the pit walls.
A small village sits at the edge of Black Pit. It is a dreary, desolate place, where despair hangs in the air as thick and toxic as the vapors rising out of the chasm. Here, all manner of thieves, murderers, and deserters from the war gather to hide and live. A thriving black market exists in the village of Black Pit (which names itself after the nearby chasm), where those who have stolen great items of power often come to hole up until those hunting them lose interest.

Type

Crater / Crater Lake / Caldera