Hueco Mundo (Seireitou)

Hueco Mundo (虚圏 (ウェコムンド), Wekomundo; Spanish for "Hollow World", Japanese for "Hollow Sphere") is the dimension where reside. It is one of the three worlds created by the. Spatially, it exists between the and the, while also covering up the pit of.

Overview
An unchanging night covers the sky, an endless white desert covers the ground. The tree-like objects are not plants, but rather quartz-like minerals. Hueco Mundo is a world of dense atmospheric, more so than that of or the. While always in a state of night, the lunar phase of this world is noted as being the opposite of the Human World. According to the, all Hollows live in Hueco Mundo, regardless of their nature. As such, they instinctively know how to access Hueco Mundo once becoming Hollows.

The climate of Hueco Mundo is typical of that which one would find in a desert within the Human World. However, while deserts are often noted as being considerably cold at night, the world of Hueco Mundo, which is constantly in a state of night, does not appear to have a significant drop in temperature. While the temperature does vary, it is often rather stable all year round. There are natural weather phenomena that occur from time to time, such as sandstorms and thunderstorms. While the skies of Hueco Mundo do possess clouds of some degree, there are no forms of precipitation. There are varying obscure regions where the climate differs from the general desert sands of Hueco Mundo.

Geography
The realm of Hueco Mundo is exceedingly vast, rivaling that of the other worlds. It is primarily a desert of white sand and quartz-like trees that go on for miles without end. There are seemingly no bodies of water anywhere within the desert. It is also home to a variety of rock formations. Within Hueco Mundo, there exists a variety of different man-made structures, such as and the.

Adjuchas Den
Scattered throughout Hueco Mundo are cliff dwellings where the live and hide from the more powerful Hollows such as the. These dens lead into a multitude of tunnels resembling ant colonies, making it very easy for someone unfamiliar with the structure to lose their way. These dens are entrances to the Menos Forest.

Menos Forest
Otherwise known as the Arbolada de al Menos (大虚の森 (アーボーラーダー・ディー・アル・メノス), Ābōdā dī aru Menosu; Spanish for "Great Minus Forest", Japanese for "Forest of the Great Hollows"), the Menos Forest is a region underneath the sands of Hueco Mundo. It is a vast woodland-like area filled with silvery quartz trees that dot the ceiling. The tips of these same trees are found in the sands of Hueco Mundo. Cliffs and fissures litter the forest, suggesting that there are multiple layers to the Menos Forest.