The Plateau of Leng is a location in Antarctica, where the Elder Things built one of their greatest Earthly cities. It was first discovered by geologist William Dyer and graduate student Danforth. In The Dream-Quest of Unknown Kadath, the Plateau of Leng is located in the northern Dreamlands and is inhabited by satyr-like degenerates known as the Men of Leng. It is also the dwelling place of the High Priest Not to be Described, possibly an avatar of Nyarlathotep.