Hollow Nights Palace. A grand construction veiled by a cracked, decrepit dome that stands proudly in the middle of the endlessly night-shrouded desert. Within exists a massive central castle that looks just as worn down as the dome where the King and/or Queen administers the whole of Hueco Mundo. Surrounding the primary castle in the center are five others-- one for each of the Espada, though two of which have been mostly destroyed. The inside of the dome creates a false sky that provides the only sunlight this world sees.