Hueco Mundo

Hueco Mundo is one of the three planets that make up the Triad. It is a reverse world whereby its "center" of gravity is actually its entire outershell, making it possible to stand up on its underside and look up into the center of the planet. It serves as Epona's moon.

Hueco Mundo is the oldest member of the Triad by far, to the point where there is nothing natural living upon it anymore, and all has degraded into dust. Its outer surface is grey and completely barren, with no plants or even bacterial life present. Its inner surface is similar, but with the shattered rocks replaced by a nearly endless sea of colourless sand. Some regions of its inner surface are rocky.