The Great Void is the infinite empty space that surrounds the world. It has been confirmed from temporal travel that this void was in the beginning before creation and will be at the end after all has been destroyed. It is one of the major tenets of Brogmoidism that the Great Brogmoid "saveth us from plunging into the Great Void." One of the major discoveries of the year 883 was the fact that the Great Void is not entirely empty. Other worlds do indeed exist below and above this one, supported by a presumably infinite string of Brogmoids. Along with these planets, are also stars and galaxies. But the Great Void stretches into blackness even beyond these.

Those who have attempted to jump off the bottom of the world have reportedly fallen to a new, wondrous world where purple forests surround lakes of molten rock, volcanoes belch green-blue smoke into the sky, and enormous slug-shaped creatures, a bloit long, engage in fierce combat. This other world is most likely the same bizarre place visited by the Head of the Circle of Enchanters. In the year 966 he found a strange environ filled with living rocks that devoured metal for nourishment.

Those who have used Dimwit Flathead's magical chessboard set, have seen a similar Great Void off the edges; it is uncertain if this is the same void.