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The home of the Hollows and Arrancars in Bleach. In a recent arc, it was raided by Ichigo and his friends.
Hueco Mundo exist a plane between Soul Society and the real world. In it exist a form of refuge for hollows, as its air is richley filled with spirit particles. At first glance Hueco Mundo apears to be nothing but a giant white sanded desert with a full moon. But beneath the sand exist an entire forest full of hollows in nearly every corner.