Mu

Mu is the name of a proposed lost island (or continent), first advanced by Augustus Le Plongeon, who held it to be the same land as Atlantis, based on his translations of Mayan glyphs discovered at the Pyramid of Xochicalco, which he held described a "country situated in the basin of the Atlantic ocean [that] was reduced to ashes."

The concept of Mu was later re-developed at great length by James Churchward in a series of books, beginning with "The Lost Continent of Mu: the Motherland of Man" (1926), in which he set forward the argument that the continent existed formerly in the Pacific Ocean, and was home to a peoples called the Naacal.