bottomless pit

So what of the photograph of what the Senate report described as a “well-used waterboard” with buckets around it, at the Salt Pit?
CIA Interrogation Chief: ‘Rectal Feeding,’ Broken Limbs Are News to Me|Kimberly Dozier|December 11, 2014|DAILY BEAST
He watched the pit grow bigger every month, despite the numerous reports he wrote about the facility.
Two Texas Regulators Tried to Enforce the Rules. They Were Fired.|David Hasemyer, InsideClimate News|December 9, 2014|DAILY BEAST
He said he watched waste haulers back up to the pit and unleash torrents of watery muck.
Two Texas Regulators Tried to Enforce the Rules. They Were Fired.|David Hasemyer, InsideClimate News|December 9, 2014|DAILY BEAST
In several reports he urged the pit operators to safeguard the birds.
Two Texas Regulators Tried to Enforce the Rules. They Were Fired.|David Hasemyer, InsideClimate News|December 9, 2014|DAILY BEAST

Abarca allegedly battered Hernandez, who was then dumped in the pit.
Mexico’s First Lady of Murder Is on the Lam|Michael Daly|October 29, 2014|DAILY BEAST
With the management of these, however, the Earl of Pit Town did not trouble himself.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
At length the great Pit Town collection was housed as it deserved to be.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
Old Pit Town knows lots of good people, and would give us letters, I suppose.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
Certes le capitaine Merveilles et ses gens monstrerent leur pit non vulgaire.
The Jesuit Relations and Allied Documents, Vol. II: Acadia, 1612-1614|Various
We never see such horrors now; and I actually envied Pit Town the possession of that picture.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills

Origin of bottomless pit