The Zorkian Caverns referred specific to the unsunken portions of an ancient city within the Cliffs of Depression; they were engineered by Canuk in the 1640s for the mining of translumynite. This was also the location of one piece of the Nectus before being found by Cliff Robinson. (See 'Cliffs of Depression' entry for more information.)

SOURCE(S): Return to Zork (design documents)